Question

if area of sector of circle with radius 10 cm is 25 pi cm² find angle at centre​

Answer 1

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Given, radius, r=10cm, central angle, θ=72o, π=3.14

Area of sector =360oθ×πr2

                       =360o72o×3.14×10×10

                        =36072×314

                        =5314

                        =62.8

∴ The area of sector is 62.8cm2.