Parts of a circle
The measurement from the center of the circle to the edge of the circle.
Radius
Find the radius with a diameter of 10 cm
5 cm
Find the diameter with a radius of 10 cm
20 cm
What is the circumference of a circle with diameter 7 cm?
22 cm
The measurement from one edge of a circle, passing through the center, to the other edge.
diameter
Find the radius with a diameter of 4 cm
2 cm
Find the diameter with a radius of 2 ft
4 ft
A circle circumference is 44 cm. How many is the diameter of the circle?
14 cm
The measurement around the circle
Find the radius with a diameter of 16 ft.
8 ft.
Find the diameter with a radius of 5 m
10 m
Diameter of a circle is 100 cm. How many is the circumference?
3.14 x 100 = 314 cm
What is the value of pi?
3.14 or 22/7
Find the radius with a diameter of 22 mm
11 mm
Find the diameter with a radius of 5.5 cm
11 cm
The radius of circle is 500 cm. What is the circumference of the circle?
3.14 x 1000 = 3 140 cm
Explain the best use of the pi of 3.14 and 22/7 in a circle question.
If the diameter of radius is multiple of 7, we'd better use pi of 22/7 instead of 3.14
Find the radius with a diameter of 7 in
3.5 in
Find the diameter with a radius of 112.5 cm
225 cm
Circumference of a circle is 440 cm. How many is the diameter of the circle?
140 cm