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Geometry worksheet in which students measure and find the sum of the angles of a triangle to develop a theorem and use the theorem to calculate missing angle measures in triangles.
Geometry worksheet to help students apply a theorem to calculate missing angle measures in figures containing triangles; and use algebra to find missing angle measures.
​Assignment 4.8

​The Sum of the Measures of Angles of a Triangle

 
Objectives

Measure the angles of triangles to develop a theorem about the sum of the measures.

 

Apply the theorem to calculate angle measures in triangles.

 
 
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About Geometry Worksheet Assignment 4.8:     

 

Assignment 4.8 is the development and application of the theorem about the sum of the measures of the angles of a triangle.

 

Prerequisite Skills:  Measure angles with a protractor (Assignment 2.6).  Solve algebraic equations with one variable.  Evaluate algebraic expressions.     

 

Theorem:  The sum of the measures of the angles of a triangle is 180.

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