Exemplar example problems I — task. Mathematics CBSE, Class 10.

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1. If the area of a circle is \(154 \ cm^2\), then its perimeter is

\(55 \ cm\)
\(44 \ cm\)
\(22 \ cm\)
\(11 \ cm\)

2. If \(\theta\) is the angle (in degrees) of a sector of a circle of radius \(r\), then the area of the sector is

\(\frac{2 \pi r \theta }{180}\)
\(\frac{\pi r^2 \theta }{360}\)
\(\frac{\pi r^2 \theta }{180}\)
\(\frac{2 \pi r \theta }{360}\)

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