Proofs Theorems about Triangles Geometry

Proofs Theorems about Triangles Geometry
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Proofs Theorems about Triangles Geometry
Proofs Theorems about Triangles Geometryplay
Proofs Theorems about Triangles Geometry
Proofs Theorems about Triangles Geometry
Proofs Theorems about Triangles Geometry
Proofs Theorems about Triangles Geometry
Proofs Theorems about Triangles Geometry
Proofs Theorems about Triangles Geometry
Proofs Theorems about Triangles Geometry
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Grade Levels
Common Core Standards
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1 MB|51 pages
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  1. Proofs and Parallel Lines Digital Unit compatible with Google Slides Lesson 3.1: Exploring Angles formed by Parallel Lines and their Transversals Lesson 3.2: Writing Equations to Solve for Unknown Angles Lesson 3.3: Basic Proofs Lesson 3.4: Prove Theorems about Lines and Angles Lesson 3.5: Prove T
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Product Description
Proving Theorems about Triangles

• Materials: device with internet, google account
• Prerequisite Skills:
There are many prerequisite justifications for this lesson. they are listed in the lesson to refresh the mind, but not defined or explained. Definitions include: parallel lines, perpendicular lines, complementary angles, supplementary angles, congruent angles, right angles, vertical angles, linear pairs
• Interior and exterior angles of a triangle are explicitly defined with visuals.
Isosceles triangles are defined.
• Base Angles of an Isosceles Triangle Theorem is shown, but will be proven when students study congruent triangles. The theorem is used as a justification, as well as solving for variables in more traditional problems.
• The triangle sum theorem and exterior angles of a triangle theorem are proven as part of this lesson. These proofs are scaffolded to help develop skills for writing proofs. A proof using base angles of an isosceles triangle theorem follows these proofs.
• A quick lesson summary helps students reflect upon the new theorems learned.
• 5 Practice proofs follow the lesson and may be used as an assignment or formative assessment
• The 6th practice problem is a set of 4 figures that ask students to solve for the variable. Transferring the meaning of the new theorems will be used to solve these 4 problems.
• If you would not like your students to have the answers to grade as they go, simply delete those slides before sharing the file with your students.
• Note: Lesson format is compatible with Google slides®
• Answer keys included
Total Pages
51 pages
Answer Key
Included
Teaching Duration
1 hour
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