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This powerpoint leads students through an investigation that will show them if any three lengths will make a triangle.
The students use pipe cleaners cut into certain lengths to see if they can make a triangle. You could also use string, yarn, tape, or straws.

Students use spaghetti noodles to explore the Triangle Inequality Theorem and the Triangle Angle-Side Relationship Theorem. Each group needs 4 sticks of spaghetti that they cut to different lengths using a ruler and scissors. This is a Flipchart file also converted to PDF for a slide show.

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This activity allows students to investigate real-world distances in order to discover The Triangle Inequality: the length of the third side of a triangle must be greater than the sum of the first two sides. This is a fun activity for students. After completing this activity I have them create th

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***NO PREP LESSON*** This ready to use product is designed to help students understand the Triangle Inequality Theorem. Students will start by cutting out 8 pencils of different lengths (1 in - 8 in) and use these to form triangles and non-triangles (Preselected triangle lengths are given on the st

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This is a maze consisting of 14 Inequalities in One Triangle problems in which students are given 2 sides of a triangle and must use the Triangle Inequality Theorem to find the range of value for the third side of the triangle.
Please view the preview for a picture of the completed maze to determin

Nothing like a good criminal investigation to liven up math class! Based off my popular CSI projects, I have created Whodunnits? The Whodunnits plan to focus on single content topics as opposed to units and will focus more on skill building than application. Every day can't be a project day, so Whod

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Also included in: Whodunnit? -- GEOMETRY CURRICULUM BUNDLE - 28 Skill Building Activities

Triangle Inequality Theorem Investigation!
Geometry practice for grades 8-12.
Promote student analytical thinking through an inductive approach to the triangle inequality theorem! Triangle Inequality Theorem Investigation is a great introduction to the triangle inequality theorem and can help in s

This card sort activity requires students to use the Triangle Inequality Theorem, Converse of the Pythagorean Theorem, and Pythagorean Inequality Theorems to classify triangles as Acute, Obtuse, Right, or Not a Triangle when given 3 side lengths.How It WorksStudents will cut out the 20 boxes and the

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Also included in: Right Triangles & Trigonometry Activity Bundle

This is a discovery learning activity where students work in pairs or groups to determine what the relationship is between angle measures and the lengths of the opposite sides within a triangle. My students found an investigation activity more interesting than simply stating the theorem and it help

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Students use the Triangle Inequality Theorem which states that the sum of any two sides of a triangle must be greater than the third to find a path through the maze. Students can also challenge one another by creating their own maze and key.
Also see http://systry.com/triangle-musings/ for two fre

This 3 page document is a set of guided notes for teaching triangle inequalities and how to compare sides and angles of a triangle. Go through the notes with the class as student write in the notes.
Includes problems called "Am I a Triangle?" and listing sides and angles in order from shortest to

Nothing like a good criminal investigation to liven up math class! Based off my popular CSI projects, I have created Whodunnits? The Whodunnits plan to focus on single content topics as opposed to units and will focus more on skill building than application. Every day can't be a project day, so Whod

Nothing like a good criminal investigation to liven up math class! Based off my popular CSI projects, I have created Whodunnits? The Whodunnits plan to focus on single content topics as opposed to units and will focus more on skill building than application. Every day can't be a project day, so Whod

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Through a hands-on activity, students will discover the Triangle Side Inequality Theorem (sum of any two sides must be greater than the third side). Students will use manipulatives to determine which combinations of sides will form triangles.
Discovery Activity details:
➡ 10 investigative examples

This is a set of 24 Task Cards (with & without QR codes) to help strengths students’ skills in working with all the theorems and properties of right triangles and trigonometry in a Geometry class. The task cards do not say which property/theorem is needed so students need to be able to recogniz

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Also included in: Right Triangles & Trigonometry Activity Bundle

This Geometry VALUE PACK contains 16 products that explore the various relationships found within triangles (special segments, inequalities, angle sum, etc.). This VALUE PACK includes:
-Triangle Inequality Riddle Time #1
-Triangle Inequality Riddle Time #2
-Triangle Inequality Riddle Time #3
-Trian

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Guided notes with answer key. Great for interactive notebooks. Full page and half size notes included in download.These notes help students investigate that the angles in a triangle add up to 180 degrees by having students rearrange the angles of a triangle to form a straight angle. Page of triangl

This PDF includes an organized list of the sections along with links to all of the resources I use for the entire unit. As I update my worksheets to improve them, the links will update as well. Most of my worksheets include guided notes, practice problems, differentiated homework, and a QR code so k

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GeoGebra is an interactive geometry, algebra, statistics and calculus application, intended for learning and teaching mathematics. This activity allows students to investigate triangle theorems, including the triangle inequality, using the GeoGebra application.

"The mission of Common Core Math Solutions is to create engaging, highly effective resources for the math classroom"
Unit Objectives:
1) Review and apply the concepts of corresponding angles and sides
2) Solve a variety of problems involving the concept of scale
3) Draw, construct, and describe ge

Students will use the sides of squares to surround a triangular area, compare the areas of the squares, and find an inequality or equation for each type of triangle (acute, right, obtuse). Includes two investigations and one comic.
For more AIMS Activities visit us at:
http://www.aimsedu.org/catego

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