Answer:
a. 90 degrees (given)
b. 270 degrees (360-90)
c. 16π (Circumference= diameter * π, diameter= 2r= 2(8)=16, so c= 16*π)
d. 4π (That section is a semicircle, so length should be 1/4 the circumference)
e. 12π (This section is 3/4 the circumference)
f. 64π (Area= πr^2, and r^2= 8^2= 64, so 64π)
g. 16π (That section is 1/4 the area)
