Topics
3. Triangles
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United States of America
Grades 9-12

3.02 Isosceles and equilateral triangles

Lesson
Practice
Adaptive
Worksheet

Interactive practice questions

Determine whether the following statement is true or false for the corresponding figure:

The sides of a triangle are labeled with lengths of $7$7 units, $11$11 units, and $12$12 units.

The triangle shown above has two congruent sides.

False

A

True

B
Easy
< 1 min

Determine whether the following statement is true or false for the corresponding figure:

Easy
< 1 min

Determine whether the following statement is true or false for the corresponding figure:

Easy
< 1 min

Select all three isosceles triangles:

Easy
< 1 min
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Outcomes

HSG.CO.C.10

Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180°; base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point.

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