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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.)

8 In the figure a circle is inscribed in a square ABCD If the area of the square is 81 cm find the area of the circle Give the answer correct to 3 significant f class=

Respuesta :

emelynkoh

Answer:

63.6cm²

Step-by-step explanation:

Area of square = 81

Side of square = [tex]\sqrt{81}[/tex]

                        = 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

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