Answer:
Answer is letter D
Calculations:
m∠T = m∠R Since opposite angles are congruent (Theorem of a Parallelogram)
3x-5 = x+21 Substitute
3x-x = 21+5 Exchange x and 5 (Isolate)
2x / 2 = 26/2 Divide both sides by 2 to find x
x = 13
m∠R + m∠A = 180 Since consecutive angles are supplementary
34 + x +180 x is 13 so substitute 13 to x + 21 to find m∠R
x = 180 - 34
x = 146° Answer is D
Hope It Helps...
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Answers & Comments
Answer:
Answer is letter D
Calculations:
m∠T = m∠R Since opposite angles are congruent (Theorem of a Parallelogram)
3x-5 = x+21 Substitute
3x-x = 21+5 Exchange x and 5 (Isolate)
2x / 2 = 26/2 Divide both sides by 2 to find x
x = 13
m∠R + m∠A = 180 Since consecutive angles are supplementary
34 + x +180 x is 13 so substitute 13 to x + 21 to find m∠R
x = 180 - 34
x = 146° Answer is D
Hope It Helps...