Radius
In-terms of Pi
Circumference
Area
Area & Perimeter
100
Find the diameter if the radius is 72 yards.
144 yards
100
If a circle's radius is 3, what is the area of the circle in terms of pi?
9pi
100
Find the circumference if the radius is 6 km.
About 37.68km or 38 km.
100
Find the area of a circle with a radius of 12 mm.
About 452.16 square mm OR 452 square mm.
100
What is the area of the figure?
About 13.42 ft squared OR 13 ft squared
200
What is the radius if the diameter is 586 mm?
293 mm
200
Find the circumference in terms of pi, if the radius is 15.
30pi
200
Find the circumference if the diameter is 44 cm.
About 138.16cm or 138 cm.
200
Find the area of a circle with a diameter of 50 ft.
About 1962.5 square ft OR 1963 square ft.
200
What is the area of the figure?
About 139.36 cm squared OR 139 cm squared
300
Find the diameter if the circumference is 201 m.
About 64.01 m or 64 m.
300
Surprise Question!
Each group has 10 seconds to write as many digits down of pi as they can on their whiteboard.
The group with the digits furthest out that are all correct wins.
pi = 3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825
300
Find the circumference of the black line. 
About 18.84in or 19 in.
300
Find the area of this shape.
About 37.68 square inches OR 38 square inches.
300
What is the perimeter of the figure?
About 13.42ft OR 13 ft
400
How many rotations does the tire need to do in order to travel 13,200 ft?
About 200 rotations
400
Write two expressions for the circumference of the image in terms of pi.
The side length of a square is 2.
Examples
12 + 8pi
6*2 + 2 * 4pi
2*3*2 + 2 *(2*2pi)
400
Find the perimeter of this shape with a diameter of 5 ft.
About 12.85 ft or 13ft.
If you got 7.85ft or about 8ft, you forgot to add the straight line.
400
Find the area of this shape with a diameter of 11 yds.
About 47.49 square yards OR 47 square yards.
400
What is the perimeter of the figure?
About 45.68cm OR 46cm
500
What is the radius if the area is 1256 m2?
About 20 m
500
Write three expressions for the area of the image in terms of pi.
The side length of a square is 4.
42*4 + 1 1/2 * (42pi)
64 + 24pi
16 + 16 + 16 +16 + 16pi + 8pi
500
Find the circumference if the area is 78.5 square inches.
About 31.4 in.
500
Find the area if the circumference is 50.24 mm.
About 200.96 square millimeters OR 201 square millimeters.
500
A goat is tied to a 6 foot rope. It travels around all day eating up all the grass. Now the farmer needs to plant new grass seed.
Each bag of grass seed covers about 4ft2.
How many bags of grass seed is the farmer going to have to buy in order to spread grass seed on the now muddy circle?
The farmer would need 29 bags in order to cover all of the area and would have seed left over.