Question

If the radius of a circle is 4 cm and the length of an arc is 10 cm, then find the area of the sector.

Answer 1

r = 4 cm, the length (l) of the arc = 10 cm, A(sector) = ?

The area of the sector = `r/2 xx l`

= `4/2 xx 10`

= 20

The area of the sector is 20 cm².