Radius and Diameter
Circumference
Area
Circles and Beyond
Shaded Area/Misc.
100
How do you find the radius if you are given the diameter?
Diameter divided by 2 gives you the radius.
100
Define circumference
The distance around a circle.
100
Find the approximate Area of a circle when
Radius = 4 units
Area = 50.24 square units
100
What is the longest chord on a circle?
The diameter.
100
What is the ratio for finding pi?
Circumference divided by its diameter or
C/d
200
What is the radius of a circle if the diameter is 19 ft.
Radius = 9.5 ft.
200
Find the approximate circumference:
When radius = 5 ft.
31.4 ft.
200
Find the approximate Area of a circle
when diameter = 14 ft.
area = 153.86 sq. ft.
200
Jimmy is going to run 4 times around the circular lake. If the lake has a diameter of 12 meters, what would be the distance he runs around the lake?
150.72 meters
200
If the following Semi-circle has a diameter of 16 yd, what is the area?
100.48 sq. yd.
300
What is the diameter of a circle if the radius is 19.4 yd.
diameter = 38.8 yd.
300
Find the approximate Circumference
when diameter = 21 in.
circumference = 65.94 in.
300
Find the approximate Area of a circle when the diameter = 4.2 mi. Round to the nearest hundredth.
Area = 13.85 sq. mi.
300
What is the name for the point in the middle of a circle?
Origin or center
300
How is finding an exact area different from finding an approximate area?
Exact keeps pi in the answer.
400
What is the radius of a circle if the diameter is 16.5 mi
Radius = 8.25 mi
400
Jenn will be walking around the circular running track 2 times. What is the distance she will travel if the radius of the track is 12 meters?
150.72 meters
400
Find the approximate Area of the following shape:
Area = 28.26 sq. cm
400
A circular silver tray has a diameter of 28 centimeters and a circumference is 87.92 cm. How would you find pi?
87.92 divided by 28
400
The inner circle has a radius of 9 in. The outer circle has a diameter of 24 in. Determine the approximate area of the shaded region.
About 197.82 square inches.
500
If the radius is
2 3/5
What is the diameter?
5.2 or
5 1/5
500
Find the approximate diameter when the Circumference is 69.08 m
Diameter = 22 m
500
Find the approximate Area of a circle when the circumference is about 37.68
Area = 113.04 (radius is 6)
500
What is the length of this walking path?
Determine the distance the runners run around the edge of the track. Round to the nearest whole number
1,320.28 feet
(Outer rectangle is 1000 ft, and 2 semi circles that are about 160.14 ft each or 320.28 ft total)
500
Jackie will be painting a mural of a basketball in the gym. What area will she be painting if the basketball will have a diameter of 18 yards?
254.34 yards2