One mark exercise problems — task. Mathematics State Board, Class 7.

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1. The formula used to find the area of the circle is \(sq. units\).

2. The ratio of the area of a circle to the area of its semicircle is .

3. Area of a circle is radius '\(n\)' units is

\(\pi n^2 \ sq. \ units\)
\(\pi m^2 \ sq. \ units\)
\(\pi r^2 \ sq. \ units\)
\(2\pi r^p \ sq. \ units\)

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