Using Opposite Angles Test for Parallelogram, Prove that Every Rectangle is a Parallelogram. - Geometry
Using opposite angles test for parallelogram, prove that every rectangle is a parallelogram.
Let ABCD be a rectangle.
∠A = ∠B = ∠C = ∠D = 90°.
For any quadrilateral to be a parallelogram, pair of opposite angles should be congruent.
In rectangle ABCD,
∠A = ∠C = 90°
∠B = ∠D = 90°
Thus , rectangle ABCD is a parallelogram.
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