A large circular plate has a radius of 20 centimeters. A small circular plate with a circumference of 20 pi centimeters is placed in the center of the larger plate. What is the area of the larger dinner plate that is not covered by the smaller plate?

3rd box is the answer

step-by-step explanation:

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:

16.9 times 2.85

step-by-step explanation:

d

step-by-step explanation:

i used the pitagoras theoreme