Question

HELP WORTH 99 POINTS IM SO CONFUSED.

A. At a zoo, the lion pen has a ring-shaped sidewalk around it. The outer edge of the sidewalk is a circle (blue) with a radius of 11 m. The inner edge if the sidewalk is a circle (orange) with a radius of 9 m. Find the approximate area of the larger circle (blue)


B. Find the approximate area of the smaller circle (orange)


C. Find the approximate area of the sidewalk (shaded region between the blue and orange circles.)




Use 3.14 for pi. Show your work!

(use 3.14 pi on all three problems!)

Answer 1

Area of Large Circle = 380.13

Area of Small Circle = 254.47

Area of Sidewalk = 125.66

Explanation:

The side walk is just subtracting the smaller number from the bigger one.

The area is just Pi*r^2

Answer 2

A 379.94 m^2

B 254.34 m^2

C 125.6 m^2

Explanation:

A Area of a circle is given by

A = pi r^2

We know the radius is 11

A = pi 11^2

A = 3.14 (121)

A = 379.94 m^2

B The Area of the orange circle

A = pi r^2

The radius is 9 m

A = pi 9^2

A = 3.14 (81)

A = 254.34 m^2

C The Area between the circles is the difference between the large circle and the small circle

Ablue-Aorange

379.94-254.34

125.6 m^2