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What is the ratio between the inradius a...

What is the ratio between the inradius and the circumradius of a square ?
किसी वर्ग की अन्तः त्रिज्या (इन रेडियस) तथा परित्रिज्या (सिरकम-रेडियस ) का अनुपात कितना है ?

A

`1:2`

B

`sqrt2 :3`

C

`1 :3`

D

`1: sqrt2`

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