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Geometry worksheet to help students name exterior angles and remote angles of triangles, and develop and apply the theorem for the sum of measures of exterior angles.

Activity 3.8​

Assignment 3.9

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​Assignment 4.16

​Exterior Angles of Triangles

 
Objectives
Name exterior angles and their remote angles in triangles.
 
Develop and apply a theorem for the sum of the measures of exterior angles of triangles.
 
 
 
 
 
 
Geometry worksheet to help students apply the theorem for the sum of measures of exterior angles of triangles to find missing measures of exterior or remote angles, and, write and solve equations to find angle measures.

About Geometry Worksheet Assignment 4.16:        

 

Assignment 4.16 is an introduction to exterior angles of triangles and the theorem about their measures.

 

Prerequisite Skills:  Calculate the measures of angles in linear pairs (Assignment 4.4).  Calculate the measures of angles in triangles (Assignment 4.8). Solve algebraic equations with one variable.  Evaluate algebraic expressions. 

 

Definition:   The remote angles for an exterior angle of a triangle are the two angles of the triangle that do not have the same vertex as the

                           exterior angle.

 

Theorem:      The measure of an exterior angle of a triangle is equal to the sum of the measures of the remote angles.

 

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