Please help!
Which of the following statements are true? Select all that apply.
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A 23 22 because they are alternate interior angles.
B. m21 + m23 = 180° because they form a straight angle,
C 23 - 26 because they are alternate interior angles.
D. 21 and 26 are supplementary because 23 e 26 and m 41 +m43 = 180