Question

find perimeter of this figure​

Answer 1

Answer:

231 m^2

Step-by-step explanation:

formula for circumference for full circle

2πr

therefore for 0.25 of circle

it should be 2πr÷4

2 *22/7*21÷4

231

ans will be

231 m square

Answer 2

Answer:

Here, given figure is quadrant so angle is

${90}^{0}$

$now \\ length \: of \: arc = (2\pi r \times \alpha ) \div {360}^{0 } \\( 2 \times 22 \times 21 \times 90) \div {360}^{0} \\ (44 \times 1890) \div 360 \\ 83160 \div {360}^{0} \\ 231m$

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