Sum of Interior Angles of a Triangle Answers

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7

For the angles shown in the diagram, which statements are true? Select all that apply.

A
The sum of m∠3 and m∠4 is 180°.
B
The sum of the measures of the adjacent interior angle and one of the remote interior angles is equal to the measure of the exterior angle.
C
∠3 is supplementary to ∠1.
D
m∠4 = m∠1 + m∠2.
E
m∠1 + m∠2 + m∠3 = 180°

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