There are two sprinklers that spread water in a circular sector (90 degrees). They only spray in an 18-foot radius. The lawn measures 18' by 36' , and each sprinkler has a spray radius of 18'. What is the area of the section of lawn that is not watered by either sprinkler?

i think its a and d

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.