Question

Find the arc length of the partial circle.

Answer 1

$\qquad\qquad\huge\underline{{\sf Answer}}♨$

As we know :

Length of arc = Radius × Angle made by Arc at center [ in radians ]

$\qquad \tt \dashrightarrow \: arc = radius \times angle \: \: ( in \: \: rad)$

$\qquad \tt \dashrightarrow \: arc = 8 \times \dfrac{ \pi}{2}$

$\qquad \tt \dashrightarrow \: arc = 4 \pi \dfrac{ }{} \: \: units$

or

$\qquad \tt \dashrightarrow \: arc = 4 \times 3.14 = 12.56 \: \: units\dfrac{ }{} \: \:$