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Question

If a square with side ‘a’ is inserted within a circle such that the corners coincide with the circumference of the circle with diameter ‘d’. Find the relation between ‘a’ and ‘d’.


A

a = d

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B

a = d/ √2

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C

a = d/2

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D

a = 2d

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Solution

The correct option is B

a = d/ √2


We are asked to find the relation between the diameter of the circle and the side of the square.

Let us consider the triangle ABC, \(\angle ABC = 90^\circ\)

Therefore we can consider triangle ABC as a right angled triangle with sides = ‘a’, and hypotenuse =‘d’.

Applying the Pythagoras Equation, we get d2=a2+a2

a2=d22

a=(d22)

a=d2

Therefore the relation between the sides of the square and the diameter of the circle is, a = d2


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