Question

8.

In the figure, a circle is inscribed in a square
ABCD. If the area of the square is 81 cm², find
the area of the circle.
(Give the answer correct to 3 significant figures.)

Answer 1

63.6cm²

Explanation:

Area of square = 81

Side of square =
`√(81)`

= 9

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diameter of circle = 9

radius of circle = 9 ÷ 2

= 4.5

area of circle = πr²

= π (4.5)²

= 63.6172512

≈ 63.6 cm²