Question

The width of the tiled portion is 1.5 feet. What is the area of the tiled portion of the patio, rounded to the nearest whole square foot?
59 square feet

29 square feet

44 square feet

70 square feet

Answer 1

I have no idea how to do this...completely lost. someone please do a step by step.

Answer 2

area of a semi-circle\[A = \frac{1}{2} \pi r^2\]

the area of the path is area of the large semi- circle - area of the small semi-circle

find the area of a semi-circle radius 8.5 feet

find the area of a semi-circle with radius 7 feet

Answer 3

wait what path? im still confused.

Answer 4

the tiled portion....

Answer 5

i got it!!! so 59?

Answer 6

oops slight mistake... large semi-circle has a radius of 7 ft
small semi -circle has a radius of 5.5 ft

Answer 7

I got 29.45

Answer 8

how? i got 39.5

Answer 9

please explain what you did..i'm sorry im sending you through all this trouble.

Answer 10

Large Semi-Circle

\[A = \frac{1}{2} \pi 7^2 = 76.969\]

small semi-circle

\[A = \frac{1}{2} \pi 5.5^2 =47.517\]

area of tiles = 76.969 - 47.517

Answer 11

i see :) thank you campbell :)