Question

last question... maybe :p
A rectangular wall has an arched entrance cut into it. Assume the arch is a semicircle. You need to wallpaper the wall. To the nearest square foot, what is the area of the wall that you will be wallpapering?
*have to draw diagram first*

Answer 1

is the 10ft the whole length of the entrance?

Answer 2

yes

Answer 3

i got 157.08 ?

Answer 4

u should get 441.71 sq.ft

Answer 5

how so?

Answer 6

the radius of the semicircle is 2, the height of the rectangular part of the entrance hence is 8, find the area of the semicircle, the area of the rectangular part of the entrance, sum it, and deduct it from the area of the whole wall

Answer 7

area of the wall = 16 x 30 = 480 sq.ft
area of rectangle + semi circle hole = 8x4 + pi x 2

do a subtraction..