Q. 23.7( 29 Votes )

In <span lang="EN

Answer :

Given that BC AD and BC = AD (congruent)

the quadrilateral is a parallelogram (pair of opposite sides are equal and parallel)

A = 72°

C = 72° (opposite angles of parallelogram are congruent)

B = 180° 72° = 108° (adjacent angles of a parallelogram are supplementary)

D = 108° (opposite angles of parallelogram are congruent)

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