FCAT Packet #9
Due Thursday March 15
Fl.MA.6.G.4.1
Understand the concept of Pi, know common estimates of Pi (3.14;
22
) and use these values to estimate and calculate the
7
circumference and area of circles.
Circles
-----------------------------------------------------------------------------------------------------------------------------------------------------------------Circumference of a Circle
You can use 3.14 or
22
for Pi.
7
23 m
Find the circumference. Use
1.
for π on questions 1-2.
2.
Draw and label the circles below. Use the formula.
3. Find the circumference when the diameter is 6.25 inches.
4. Find the circumference when the radius is 14.
5. Find the radius when the circumference is 12.56 cm.
6. Which answer choice is the best estimate of the circumference of this circle?
a. 14 meters
7m
b. 20 meters
c. 22 meters
d. 28 meters
-----------------------------------------------------------------------------------------------------------------------------------------------------------------Area of a Circle
Find the area. Be sure to include units in your
answer.
7.
8..
13 in.
9. Find the area of the shaded region:
10. What is the best estimate of the area of
this circle?
6 cm
a.
b.
c.
d.
6 square centimeters
10 square centimeters
30 square centimeters
36 square centimeters
11. Find the area of the semi-circle.
12. Find the area of a circle with a radius of
3.25 yd.