7. Proof & Congruence

7.01 Parallel lines and transversals

7.02 Proving lines parallel

7.03 Angles of triangles

7.04 Review: Identifying congruent triangles

7.05 Proving triangles congruent

7.06 Corresponding parts of congruent triangles

7.07 Isosceles and equilateral triangles

7.08 Justifying constructions using congruent triangles

United States of America UT

Math II

7.03 Angles of triangles

Interactive practice questions

What is the sum of the measures of the interior angles of any triangle?

The measures add to $\editable{}$ °

Easy

< 1min

Consider the diagram below.

Easy

< 1min

Consider the diagram below.

Easy

< 1min

Consider the diagram below.

Easy

< 1min

Outcomes

II.G.CO.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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