Answers2026 Summer 305 Edgenuity CR_Grade 8 Pre-Algebra_MathSum of Interior Angles of a TriangleQuestion 4
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Sum of Interior Angles of a Triangle

Question 4 • 2026 Summer 305 Edgenuity CR_Grade 8 Pre-Algebra_Math

The diagram shows parallel lines cut by two transversal lines creating a triangle. Which statements are true? Check all that apply.

Answer
A
m∠A = 20°
B
∠B and the angle marked 60° are alternate exterior angles.
C
m∠C = 100° because it is a vertical angle to the angle marked 100°.
D
∠B and ∠C are supplementary angles.
E
m∠A + m∠B + m∠C = 180°
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