Question

Find the area of the sector and explain please

Answer 1

78.5398

Explanation:

Area of a circle:

a=
`\pi`r²

Radius is 10.

a=
`\pi`10²

a=
`\pi`100

a=314.15926

90° is one quarter of the circle, so multiply it by 0.25.

314.15926x0.25=78.5398

I don't know how many places the directions want it rounded to. If it said to use 3.14 for pi, the answer would just be 78.5.