Circle 3 Question 18

18. A circle is inscribed in an equilateral triangle of side a. The area of any square inscribed in this circle is… .

(1994, 2M)

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Answer:

Correct Answer: 18. a26 sq unit

Solution:

  1. In an equilateral triangle, the radius of incircle

=13× median of the triangle =13a2a24=134a2a24=a23

Therefore, area of the square inscribed in this circle

=2( radius of circle )2=2a243=a26 sq unit 



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