Circle Terms
Circumference/Area
Circumference/Area
Circumference/Area
Miscellaneous
100
The distance through the center point from one end of the circle to the other
What is the Diameter?
100
What is the circumference of a circle with a diameter of 10cm? Use 3.14 for π(pi).
What is 31.4cm?
100
What is the area of a circle with a radius of 2 feet? Use 3.14 for π(pi).
12.56 feet2
100
A cake has a radius of 12 inches, what is the circumference in terms of π?
24π inches
100
What is 112?
121
200
The distance from the center point to any edge of the circle
What is the Radius?
200
Find the circumference. Use 3.14 for π(pi).
What is 18.84 units
200
Rodney wants to figure out the circumference of the large clock in his living room, so he can decorate around it. The radius of the clock is 4 feet. Using 3.14 for π, Rodney got 12.56 cm as the circumference. What did Rodney do wrong and what is the right answer?
He used the radius to solve for circumference, instead of the diameter, which is twice the radius.
He should have gotten 25.12 cm.
200
Find the circumference. Use 3.14 for π(pi). 
What is 15.7 units
200
How is the area of a circle formula different than the circumference formula?
Area is π x r x r
Circumference is π x d
300
The distance around a circle.
What is the Circumference?
300
Jack has a tiny bicycle that has wheels with a radius of 7cm. How much distance will one complete rotation be? Use 3.14 for π(pi).
43.96 cm
300
Find the area. Use 3.14 for π(pi).
What is about 254.34 inches2
300
What is the area of a quarter circle with a radius of 4cm? Use 3.14 for π(pi).
12.56 cm2
300
If a circle has an circumference of 18, what is the diameter of the circle? Use 3 for π.
6
400
The total amount of square units/space inside of a circle.
What is the Area?
400
Find the circumference. Use 3.14 for π(pi).
What is 25.12 feet
400
There is a semicircle mirror with a diameter of 12 cm that needs to be painted white. How much paint needs to be purchased to cover the semicircle mirror? Use 3.14 for π(pi).
56.52 cm2
400
What is the area of a semicircle with a radius of 8 in? Use 3.14 for π(pi).
100.48 inches2
400
If the area of a pool is 36π feet2, what is the circumference in terms of π?
12π feet
500
What is the formula for Area of a circle AND the formula for Circumference of a circle?
What is:
A = πr2
C = πd
500
A circular rug has a diameter of 6.5 inches? Robin wants to put lace around the border. How much lace does she need? Use 3.14 for π(pi).
What is 20.41 inches?
500
Ricardo wants to use a plaid fabric to cover the top of a corner circle table (it is a quarter of a circle table) with a diameter of 20 cm? How much fabric does he need? Use 3.14 for π(pi).
78.5 cm2
500
A bike wheel has a radius of 7cm. It is released down a hill and rotated 6 times. What is the total the bike wheel has traveled? Use 3.14 for π(pi).
263.76 cm
500
The circumference of the pool is 16π feet. What is the area of the pool in terms of π?
64π feet squared