Question

in a circle if length of Arc ab is 4π cm and Central angle AOB=40 degree then find its radius​

Answer 1

$\huge\purple{Question}$

⇒In a circle if length of Arc ab is 4π cm and Central angle AOB=40 degree then find its radius​

$\huge\pink{Answer}$

⇒θ=40°

∴ Arc length = θ/360 ×2πr

∴4π2=  40 /360 ×2πr

∴r=18cm

∴ Area of sector =  1/2×r²θ

∴ Area of sector =  1 /2 ×18×18×  40 /180πcm²

∴ Area of sector =36πcm²

∴ Area of sector =113.04cm²

$\bold\huge{@alurringbabe}$