1.) a 20° sector in a circle has an area of 21.5π yd². what is the area of the circle? use 3.14 for pi. 2.)what is the area of a sector with a central angle of 3π/5 radians and a diameter of 21.2 cm? use 3.14 for π and round your final answer to the nearest hundredth.

Part 1) A 20° sector in a circle has an area of 21.5π yd².

What is the area of the circle?  

we know that

the area of a circle represent a sector of degrees

so by proportion

therefore

the answer part 1) is

The area of the circle is

Part 2) What is the area of a sector with a central angle of 3π/5 radians and a diameter of 21.2 cm?

we know that

the area of the circle is equal to

where

r is the radius of the circle

in this problem we have

Find the area of the circle

Find the area of the sector

we know that the area of the circle represent a sector of radians

by proportion

therefore

the answer part 2) is

the area of the sector is

32

step-by-step explanation:

step-by-step explanation: i dont