Math, asked by thangarajeswari1982, 1 year ago

Find the area of a sector of a circle where central angle is 30° and the radius of the circle is 42 cm.​

Answers

Answered by ButterFliee
3

Answer:

the area of sector is :-

theta/360 * πr^2

30/360*22/7 * 42*42

1/12 * 22*6*42

1* 11 * 42

=> 462 cm^2

Answered by akmalkhalid2003
4

Answer:

462 cm²

Step-by-step explanation:

Area\: of \:  sector =   \frac{ \alpha }{360}   \times \pi {r}^{2}    \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{30}{360}  \times  \frac{22}{7}  \times  {42}^{2}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{1}{12}  \times  \frac{22}{7}  \times 42 \times 42 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{1}{12}  \times 22 \times 6 \times 42  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{1}{2}  \times 22 \times 42 \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{924}{2}   \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  = 462  \:  {cm}^{2}

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