Question

How do you find area of sector if angle is 0.4 rad and adjacent angle/radius is 10?

Answer 1

`20" units"^2`

Explanation:

Area of sector is

`A_s=1/2r^2theta`

`r="the radius"`
`theta="the angle in radians"`

`A_s=1/2xx10^2xx0.4`

`A_s=1/2xx100xx0.4=1/2xx40=20 "units"^2`