Question

If central angle 45 degree,r=16cm.find the arc,area and perimeter

Answer 1

Answer:

Length of the arc

=\tt\huge{2\pi r}{\frac{\theta}{360}}2πr

360

θ

=\tt\huge{2\pi 16}{\frac{45}{360}}2π16

360

45

=\tt\huge{2\pi 16}{\frac{\cancel {45} }{\cancel{360}\:\:\:8}}2π16

360

8

45

=\huge{4\pi}4π

=\huge{12.57}12.57