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Question

The parallelogram circumscribing a circle is a rhombus.

A
True
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B
False
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C
Either
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D
Neither
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Solution

The correct option is A True
Consider the above drawn parallelogram.

We know that the tangents drawn to a circle from an exterior point are equal in length.

Therefore, AP=AS,BP=BQ,CR=CQ and DR=DS

Adding the above equations,

AP+BP+CR+DR=AS+BQ+CQ+DS(AP+BP)+(CR+DR)=(AS+DS)+(BQ+CQ)AB+CD=AD+BC2AB=2BC

(Since ABCD is a parallelogram, thus, AB=DC and AD=BC)

AB=BC

Therefore, AB=BC=DC=AD.

Hence, ABCD is a rhombus.

Hence, the given statement the parallelogram circumscribing a circle is a rhombus is true.

1482406_92657_ans_455e73a442094d3ba492c2ab0ffcb0cc.png

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