20) A D mzA = 100 + 5x mzB - 77 - 4y mzC = 106 + 3x mzD - 47 + 6y 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° 115", 65" D) 125°, 55°

Q: quadrilateral

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