given: xy ll wz and xz ll wy prove: that triangle zxy is congruent to triangle ywz.

Its a geometry proof that I don't understand
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The question describes a parallelogram, xywz, with one diagonal, zy, separating the triangles zxy and ywz.

Angle xyz=yzw, alternate angles between parallel lines.

zy is a common side.

Angles yxz and ywz are equal because they are opposite angles in a parallelogram.

The triangles are therefore congruent (AAS, a side and two angles).
by Top Rated User (1.2m points)

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