A circle with a radius of 9 m is required to be covered by circles of radius 3m. How many of the smaller circles will be needed to cover the same area?
Which is greater : Circumference of a circle or 2 times the perimeter of la semi circle or 4 times the perimeter of a quarter circle? What can you say about their areas? Justify your answer?
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no of small circles =area of bigger circle÷area of smaller circle
\pi {r }^{2} \div \pi {r}^{2}
{9 }^{2} \div {3}^{2}
9
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