top of page
where students teach themselves
A comprehensive geometry curriculum
Geometry for School and Home
Activity 3.8
Assignment 3.9
Previous
Next
Assignment 4.11
The Measures of Angles in Isosceles Triangles
Objectives
Measure the base angles in isosceles triangles to develop a theorem about the measures.
Apply the theorem to calculate angle measures in isosceles triangles.
About Geometry Worksheet Assignment 4.11:
Assignment 4.11 is an introduction to a theorem about measures of angles in isosceles triangles.
Prerequisite Skills: Calculate measures of angles in triangles (Assignment 4.8). Solve algebraic equations with one variable. Evaluate algebraic expressions.
Theorems: The base angles of an isosceles triangle are congruent.
The measure of a base angle of an isosceles triangle equals one-half the difference of 180 and the measure of the vertex angle.
bottom of page