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 of the sidewalk is a circle (orange) with a
radius of 9 m. find the approximate area of the sidewalk (shaded region between the blue
and orange circles)

i think the answer is 125.66 (or 125.6 if you use 3.14 as pi)

Step-by-step explanation:

First find the area of the blue circle by multiplying pi times the radius squared to get 380.13 (or 379.94 if multiplied 3.14)

Then find the area of the orange circle by doing the same thing to get 254.47

(or 254.34 if multiplied by 3.14)

finally subtract 380.13-254.47 to get 125.66.

(or 125.6)

19.side- angle- side

20. angle- side- angle

step-by-step explanation:

78.59 is the mean

step-by-step explanation: