M∠A = 100 + 5x
m∠B = 77 - 4x
m∠C = 106 + 3x
m∠D = 47 + 6x
Quadrilateral ABCD is a parallelogram if both pairs of opposite angles are congruent. Prove that quadrilateral ABCD is a parallelogram by finding the measures of the opposite angle pairs?
A) 95°, 85°
B) 105°, 75°
C) 115°, 65°
D) 125°, 55°
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