Question

prove that a cyclic parallelogram is a rectangle? ​

Answer 1

Step-by-step explanation:

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Answer attached above in image

Answer 2

Answer

Given,

ABCD is a cyclic parallelogram.

To prove,

ABCD is a rectangle.

Proof:

∠1+∠2=180°      ...Opposite angles of a cyclic parallelogram

Also, Opposite angles of a cyclic parallelogram are equal.

Thus,

∠1=∠2

⇒∠1+∠1=180°

⇒∠1=90°

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