(Use
)
7). (2 points) [Extra credit]
Find the area of this quarter circle:
(a quarter-circle is 1/4 of a circle)
Area = __________
8). (2 points) [Extra credit]
Find the area of the
shaded
part of this figure. (the inside figure is a circle. Find the circle's radius)
Area = __________
9). (2 points) [Extra credit]
Find the area of this figure. The right end is a half-circle.
(Hint: Find the radius of the circle)
Area = __________