The five circles making up this archery target have diameters of length 2, 4, 6, 8, and 10. What is the total red area?

Simplify your answer as much as you can.

Since I checked one that was already made of this, none of those answers worked. So please help ASAP!

SoulSlayer615 Mar 25, 2019

#1**+2 **

Area of innermost red area = pi (2/2)^2 = pi units^2

Area of next red area = pi [ (6/2)^2 - (4/2)^2 ] = pi [ 3^2 - 2^2 ] = 5 pi units^2

Area of last red area = pi [ (10/2)^2 - (8/2)^2 ] = pi [ 5^2 - 4^ 2 ] = 9pi units^2

So....the total of the red areas =

pi [ 1 + 5 + 9 ] =

15 pi units^2

CPhill Mar 25, 2019