Q.6 ABCD is a square with one vertex at the center of the circle and two
vertices on the circle. What is the length of AC if the area of the circle is 1386
square cm?
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Answer:
area of circle = 1386
● πr2 =1386
r2 = 1386×7/22
r2 = 63×7
r2 = 7×9×7
r2 = 7^3×3^3
r =7×3 =21 cm sq.
radius of circle = side of square
thus side square = 21 cm sq.
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