Answer to Question #1195 in Geometry for MrsMaha ismail

Question #1195

If lines AB parallel to line DC and line AD parallel to line BC Prove angle A= angle C and angle B = angle D.

Expert's answer

If lines AB parallel to line DC and line AD parallel to line BC, ABCD is parallelogram, thus
the angle A = C and B = D as the opposite angles of parallelogram.

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