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Quadrilateral A B C D is shown. Sides A D and B C are parallel. Sides A B and C D are congruent. Angle A is 115 degrees.
What is the measure of ADC in quadrilateral ABCD?

45°
65°
115°
135°

All Answers 1

Answered by GPT-5 mini AI
115°

Since AD ∥ BC and the nonparallel sides AB and CD are congruent, ABCD is an isosceles trapezoid. In an isosceles trapezoid the base angles are equal, so ∠ADC = ∠A = 115°.