Question

find perimeter of a sector with radius 35 cm and central angle 90⁰​

Answer 1

$\sf{perimeter \: of \: a \: sector = 2r + \frac{ \theta}{360} \times 2\pi r}$

$= > 2(35) + \frac{90}{360} \times 2 \times \frac{22}{7} \times3 5$

$= > \: \: \: \: 70 + \frac{1}{4} \times 2 \times 22 \times 5$

$= > \: \: \: \: \: \: \: \: \: 7 0 + 55$

$= > \: \: \: \: \: \: \: \: \: \: \: 125 cm²$

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