CBSE Class 10 Answered
PQRS is a square. SR is a tangent (at point S) to the circle with centre O and TR= OS. Then, the ratio of area of the circle to the area of the square is:
Asked by rushabhjain.av | 05 Feb, 2019, 06:53: PM
Expert Answer
Let r be the radius of circle and a be the side of square.
we have OS = OT = TR = r
In right ΔOSR, OR2 = OS2 + SR2 , or (2r)2 + r2 = a2
hence a2 = 5r2 .................(1)
Area of Circle : Area of square = πr2 : a2 = πr2 : 5r2 = π : 5
Answered by Thiyagarajan K | 05 Feb, 2019, 10:02: PM
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