The radius of a circle is 20 kilometers. What is the angle measure of an arc bounding a sector with area 10 square kilometers?

9

Step-by-step explanation:

Just got it right on edge

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: