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This activity guides students to develop rules for the properties of exterior angles of a triangle. Through inquiry-based learning, students are able to discover the theorem on their own and therefore understand the concept better and can remember why it works. The activity uses critical thinking.
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\$2.00
74 ratings
4.0

PDF (4.07 MB)

This matching activity is a great way to have students practice finding unknown measures of interior and exterior angles of triangles. There are 12 problems students will solve and match up the answers to on the mat. Students need to apply the triangle sum theorem and also use supplementary and co
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CCSS:
\$1.00
125 ratings
4.0

PDF (692.16 KB)

Exterior Angle and Triangle Sum Theorem Task Cards In this set of task cards, students will use the Exterior Angle Theorem and the Triangle Sum Theorem to solve problems. All of the problems are diagrams where students will solve for x or find a missing angle measure. Students will need to solve
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\$3.00
38 ratings
4.0

PDF (1.37 MB)

This product includes one page of guided notes both reviewing with students how to find missing interior angle measurements in triangles and teaching them how to find exterior angle measurements of triangles. The second page is a practice activity for the students where they are finding exterior an
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\$2.00
52 ratings
4.0

PDF (309.04 KB)

Exterior Angle and Triangle Sum Theorem Task Cards Digital Activity PERFECT FOR 1:1 CLASSROOMS! In this digital activity, students will use Google Slides to view exterior angle theorem and triangle sum theorem task cards. Students have the ability to add text boxes with their answers or to add no
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\$3.00
12 ratings
4.0

PDF (8.67 MB)

This activity consists of 3 different sets task of cards in which students will determine the measures of missing interior and exterior angles of triangles. The sets were created using three different ability levels. Set A (red) is the easiest level, Set B (blue) is the intermediate level, an
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\$3.75
18 ratings
4.0

ZIP (476.11 KB)

Students will use the exterior angle theorem to solve for unknown measures in triangles. There are 12 total dominos. The object is for students to create a domino train by matching a problem with its solution found on the next domino. Students can show their work on the recording sheet that is inclu
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CCSS:
\$2.00
12 ratings
4.0

PDF (512.79 KB)

This no prep activity is a fun and engaging way for kids to practice solving for missing interior and exterior angles of a triangle! Students are presented with a classic murder mystery riddle, and they must solve the multi-level interior and exterior angles of a triangle problems to solve the murde
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\$1.50
1 rating
4.0

PDF (3.64 MB)

#### Videos matching "exterior angles of triangles" (BETA)

This video lesson teaches students about perpendicular and parallel lines and the relationships of the angles formed when a transversal crosses a set of parallel lines. Your students will learn the following terms: parallel lines, perpendicular lines, transversal, alternate interior angles, alterna
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\$3.00
3 ratings
3.7

Video & Supporting Document

Duration: 17:27

Hello Math Teachers! Worksheets on facts about angle sum and exterior angles of triangles including angles created by parallel lines, similar triangles, the sum of the angles of triangles, and supplementary angles. I use it with my 8th grade PreAlgebra and remedial math classes as a class assignment
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CCSS:
\$1.55
8 ratings
3.8

PDF (853.99 KB)

Hello Math Teachers! 23 questions on interior and exterior angles with triangles, angle sum & exterior angle of triangles, parallel lines, vertical, supplementary angles, writing and solve equations to find missing angles. Questions also include reviewing similarity and complimentary angles
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CCSS:
\$1.95
9 ratings
4.0

ZIP (983.91 KB)

Find Exterior Angles Measures of Triangles. Guided Notes. Color Coding with Highlighters! Common Core Standard 8.G.5. Keeps students engaged as they learn and explore new concepts. This color-coding technique works well with students of all levels! Light up their learning! This technique has worked
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CCSS:
\$2.00
7 ratings
4.0

PDF (936.35 KB)

This can be used as a homework assignment, a class activity, or even enrichment! Students are challenged to recall the rules of congruency in corresponding angles, vertical angles, alternate exterior angles, and interior adjacent angles, and apply rules of solving equations to find the missing value
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\$3.00
1 rating
4.0

DOCX (334.14 KB)

This thanksgiving themed item included 20 task cards with: -interior angle sum -exterior angle sum -solving for the missing variable -answer key with step by step work -recording sheet Have students do a walk about activity, work at a center, or have the whole class answer on the smartboard! Bord
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\$2.00
11 ratings
4.0

PDF (295.19 KB)

Students will race to solve 24 task cards involving writing and solving equations to find missing interior and exterior angle measures in triangles! The student who completes the correct cards to get to the BINGO goal on their BINGO board is the winner!
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PDF (299.35 KB)

Geometry worksheet covering: • Exterior Angles and Measurements You will receive a worksheet as well as fill in the blank notes with the purchase of this resource. Students will practice the necessary skills of exterior angles of triangles to be successful in Geometry and to continue student suc
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\$4.00
1 rating
4.0

PDF (938.79 KB)

This activity contains 8 stations, a recording sheet, and an answer key. Students will identify and correct the errors in solutions to problems involving interior and exterior angles in triangles.
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PDF (339.06 KB)

This is a short review of finding interior and exterior angles in triangles. At the top it explains how to complete the problems. There are then 4 days of review questions (Monday - Thursday) that are very short and then a mini quiz for the last day. This is a great resource to use as a diagnosti
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\$1.00
5 ratings
4.0

PDF (271.7 KB)

Practice the Triangle Sum Theorem and the Exterior Angle Theorem with this activity. Cards can be cut into half sheets and hung around the classroom or used as a pass the problem. There is a recording sheet ready to be printed for the students.
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PDF (361.02 KB)

Find missing angle measures. Determine the value of variables in expressions representing angle measures. Interior Angles of Triangles Exterior Angles of Triangles
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\$1.50
5 ratings
4.0

PDF (1.34 MB)

All of my power point is animated and easily understood by students when presented on the board. I have a lot of positive feedbacks from them. Presenting information in a lively and animated manner is my foret. There are also some "work-out" problems for students to try on the board.
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PPTX (619.03 KB)

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PDF (442.44 KB)

This is an exterior angle of a triangle multiple choice quiz.
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PDF (311.52 KB)

"The measure of an exterior angle of a triangle is greater than the measure of either nonadjacent interior angle" "The measure of an exterior angle of a triangle is greater than the measure of either nonadjacent interior angle" This lesson explores how to use these theorems in geometry proofs, spe
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NOTEBOOK (297.82 KB)

Hits CC Standards 7.G.B.5,HSG-CO.C.10, and TEKS 8.8D. ✔ Excellent for class or homework! ✔ Just print and go! ✔ Answer key included! ☀ Do you want your school to buy this product for you? Click on this link and send a message to your administrator about TpT for Schools TpT for Schools. ❤
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\$1.99
\$1.59
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PDF (8.89 MB)

Nothing like a good criminal investigation to liven up math class! CSI: Geometry is a collection of nine different geometrically inspired mathematical puzzles with a little international pizazz. The nine puzzles intend to target specific Geometry units and add flair to the ordinary challenge questi
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\$45.00
\$30.00
253 ratings
4.0

ZIP (53.87 MB)

Angles of Triangles Task Cards (Triangle Sum Theorem, Exterior Angle Theorem) Students will practice finding missing angle measurements in triangles through this task card activity. Students must have an understanding of the Triangle Sum Theorem, Exterior Angle Theorem, supplementary angles, compl
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\$3.00
201 ratings
4.0

PDF (2.09 MB)

Angles of Triangles Scavenger Hunt (Includes Equilateral & Isosceles Triangles) This scavenger hunt activity consists of 20 problems in which students will practice finding angle measures in triangles. Angles given as algebraic expressions as well as verbal problems included. Students will ne
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\$3.00
152 ratings
4.0

PDF (2.53 MB)

Use these task cards instead of worksheets to get students working with parallel lines cut by a transversals and exterior and interior angles of a triangle. These task cards support 8th grade math standards CCSS 8.G.A.5 and TEKS 8.8D Choose from a variety of engaging task card activities to meet
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CCSS:
\$3.00
62 ratings
4.0

PDF (11.68 MB)

This foldable is organized into the following three tabs: 1. Vocabulary (interior angles, exterior angles, remote interior angles) 2. Triangle Sum Theorem 3. Exterior Angle Theorem It serves as a great introduction to the lesson, a class work assignment, homework assignment, or centers activity.
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CCSS:
\$3.00
93 ratings
4.0

PDF (416.25 KB)

A 7 day CCSS-Aligned Angle Relationships Unit - including parallel lines and transversals, angle sum of triangles, exterior angles of triangles, and angle-angle criterion with your students. Standards: 8.G.5 Texas Teacher? Grab the TEKS-Aligned Angle Relationships Unit. Please don’t purchase bo
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CCSS:
\$9.00
137 ratings
4.0

ZIP (1.54 MB)

Have your students apply their understanding of the ANGLE SUM OF A TRIANGLE and the EXTERIOR ANGLES OF A TRIANGLE with these fun activities including a maze, riddle and coloring activity. Whats Included: 1. Angle Sum of a Triangle MAZE This is a self-checking worksheet that allows students to st
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CCSS:
\$2.50
36 ratings
4.0

PDF (1.98 MB)

This is a coloring activity for a set of 12 problems on the exterior angle sum theorem. The exterior angle is equal to the sum of the two remote interior angles. Problems 1 - 6 are easy and problems 7 - 12 are challenging where algebra is reinforced. This product is included for free in the trian
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\$1.50
97 ratings
4.0

PDF (184.69 KB)

Geometry Angles of Triangles Riddle Worksheet This riddle worksheets covers the various angles inside and outside of triangles. These angles include the angle sum theorem, the isosceles triangle theorem and exterior angle theorem. Students are asked to set-up and solve linear equations to find th
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\$2.00
61 ratings
4.0

PDF (1.36 MB)

Students will practice using the Triangle Angle Sum Theorem and Exterior Angle Theorem to find angle measures in triangles in this Angles of Triangles Math Lib activity. Some problems require students to apply their knowledge of isosceles and equilateral triangles. Angle measures are given as alge
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\$3.00
38 ratings
4.0

ZIP (4.29 MB)

This is a maze of 19 triangles with an exterior angle that students must use the Exterior Angle Theorem to solve for one of the following: • An exterior angle when given the 2 remote interior angles • A remote interior angle when given the exterior angle & the other remote interior angle. T
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\$1.00
66 ratings
4.0

PDF (646.29 KB)

Notes to introduce/review the Triangle Angle Sum and Exterior Angle Theorems. There is space at the end for students to summarize what they learned about each theorem. In the riddle activity, student practice using the theorems to find missing angle measures. 100% Ready to Go! Just PRINT& TEACH
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\$3.00
27 ratings
4.0

PDF (379.97 KB)

ANGLES OF TRIANGLES BUNDLE - Task Cards, Graphic Organizers, Maze, Riddle, Coloring Activity This BUNDLE includes 40 task cards, 10 problem solving graphic organizers, 1 maze, 1 riddle, 1 coloring activity (over 80 skills practice and real-world word problems). The resources in this bundle are per
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CCSS:
\$8.00
\$6.00
13 ratings
4.0

ZIP (4.75 MB)

Transformational Geomtery Curriculum Bundle that aligns to the TEKS! This bundle pack contains Lesson Plans, Notes, INB pages, Homework, Quizzes, Activities, Study Guide, and a Unit Test to teach TEKS 8.6C, 8.7C-D, and 8.8D) Topics Covered: • Introducing Pythagoren Theorem • Modeling Pythagroean
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\$31.00
\$26.00
9 ratings
4.0

PDF (13.9 MB)

Have your students apply their understanding of PARALLEL LINES cut by a TRANSVERSAL with these fun activities including a maze, riddle and coloring activity. Whats Included: __ Parallel Lines & Transversals ~ Missing Angle MAZE This is a self-checking worksheet that allows students to strengt
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CCSS:
\$2.50
83 ratings
4.0

PDF (1.96 MB)

I CAN Math Games are the perfect way to make math fun! This 8th Grade Math Game focuses on the Triangle Sum Theorem and Exterior Angle Theorem, and provides students with practice in the form of multiple choice or short answer questions. QR codes (optional) make this game even more interactive as s
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CCSS:
\$3.49
22 ratings
4.0

PDF (4.97 MB)

This is a maze of 11 triangles with an exterior angle that students must use the Exterior Angle Theorem and their ability to set up & solve equations to solve for x. This self-checking activity helps students strengthen their skills in solving equations involving the exterior angle theorem.
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\$1.00
43 ratings
4.0

PDF (625.98 KB)

TEKS Aligned: 8.8D (Supporting Standard): The student is expected to use informal arguments to establish facts about the angle sum and exterior angle of triangles, the angles created when parallel lines are cut by a transversal, and the angle‐angle criterion for similarity of triangles. ___________
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\$6.00
14 ratings
4.0

PDF (1015.3 KB)

Polygons Interior and Exterior Angles Of Polygons Investigation Activity And Assignment This is an activity designed to lead students to the formulas for: 1) one interior angle of a regular polygon 2)the interior angle sum of a regular polygon 3)one exterior angle of a regular polygon 4)the exteri
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\$4.50
23 ratings
4.0

PDF (1.36 MB)

This is a foldable for angles in triangles. It is a great addition to an interactive notebook or just as a stand alone foldable in your student's notes. There are three flaps in the foldable. The flaps include: • Triangle Sum Theorem • Exterior Angle Theorem • Other Helpful Theorems Ther
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\$2.00
51 ratings
4.0

PDF (2.06 MB)

This foldable is very useful to teach the triangle sum theorem and the exterior angle of a triangle theorem. vocabulary: interior angle, exterior angle, remote angle. It is a double sided foldable in a triangle shape, nice for visual learners. It has option to print out in color as well.
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\$2.50
12 ratings
4.0

PDF (643.42 KB)

Students practice using the Triangle Angle Sum & Exterior Angle Theorems to find missing angles in triangles. 100% Ready to Go! Just PRINT & PRACTICE! Included: - 6 Practice Problems - Answer Key Connect with The Blakenator Be sure to follow my TpT store by clicking on the green ‘Follow
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CCSS:
\$1.50
30 ratings
4.0

PDF (354.15 KB)

These math stations delve analyzing interior angles and exterior angles of triangles. Students will discover connections between these angles within a triangles. Students will also delve into transversals and parallel lines. Through a discovery activity students will notice connections about the
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CCSS:
\$3.00
8 ratings
3.9

PDF (1.31 MB)

Maze A - (easy) Maze B - all isosceles and equilateral triangles (medium) Maze C - algebra 1 will be needed since there are some expressions for some of the angles (harder) Practice 1 - 10 - all exterior angle theorem problems This product is included for FREE in the Triangle Sums Bundle. Posted
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\$1.50
46 ratings
3.9

ZIP (302.86 KB)

Congruent Triangles Unit Four: Triangles & Congruency Unit #2 - Interior and Exterior Angles of Triangles Notes and Homework This is the second set of notes for a Geometry Unit on Triangles and Congruent Triangles. It includes three parts: 1. Annotated Teachers Notes and Homework Answer Key
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\$4.00
19 ratings
4.0

PDF (1.42 MB)

Triangles - Angles of Triangles Color-By-Number Wintery Worksheet This color-by-number worksheet covers finding the angles of triangles by setting up and solving linear equations. I have included the Triangle Angle Theorem, The Exterior Angle Theorem, The Isosceles Triangle Theorem and using conne
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\$2.00
15 ratings
4.0

PDF (1.44 MB)

A 7 day Angle Relationships TEKS-Aligned complete unit including: parallel lines and transversals, interior and exterior angles of triangles, and angles in similar triangles Standards: TEKS: 8.8A, 8.8C, 8.8D Looking for CCSS-Aligned Resources? Grab the Angle Relationships CCSS-Aligned Unit. Plea
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\$9.00
22 ratings
4.0

ZIP (1.5 MB)

This game of Jeopardy reviews the following skills: *Angle Relationships (supplementary, complementary, vertical, alternate interior/ exterior, corresponding) *Classifying Triangles & Polygons *Calculating angle measures within triangles *Calculating the sum of the interior angles in a polygon
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\$4.00
20 ratings
3.9

PPTX (624.85 KB)

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