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Finding Circumference
Circles
More Circles
Perimeter
Using Circumference
100
What does circumference mean?
Circumference is the distance around the outside of a circle.
100
What is the radius of a circle with a diameter of 22 cm?
11 cm
100
What is the radius of a circle with a diameter of 12 cm?
6 cm
100
A square has a side of 5 inches, what is the perimeter of that square?
20 inches
100

Circumference of a circle is 25 cm. What is the diameter? (write your answer with 2 digits behind decimal--no rounding)

7.96 cm

200

What is the circumference of a circle with a diameter of 2cm?

6.28

200
What is the radius of a circle with the diameter of 26 cm?
13 cm
200
Which is longer the radius or diameter?
Diameter
200
A triangle has three sides. The first side is 3 cm, the second side is 5 cm and the third side is 7 cm. What is the perimeter of this triangle?
15 cm
200

Circumference of a circle is 160 in. What is the diameter? (write your answer with 2 digits behind decimal--no rounding)

50.95 in

300
What is the circumference of a circle with a diameter of 6 cm?
18.84
300
What is the diameter of a circle with the radius of 14 cm?
28 cm
300
The diameter of a circle is 46 cm what is the radius of that circle?
23 cm
300
A rectangle as four sides. The width of the rectangle is 11 in, and the length of the rectangle is 9cm. What is the perimeter of this rectangle?
40 cm
300

Circumference of a circle is 48 cm. What is diameter? (write your answer with 2 digits behind decimal--no rounding)

15.28 cm

400
What is the circumference of a circle with the radius of 4cm?
25.12
400
What is the diameter of a circle with a radius of 100 cm?
200 cm
400
What does pi equal?
3.14
400
A hexagon has has six sides. Each side equals 6 in. What is the perimeter of this hexagon?
36 in
400

Circumference of a circle is 18 cm. What is the radius? (write your answer with 2 digits behind decimal--no rounding)

2.86 cm

500
What is the circumference of a cirlce with a radius of 6 cm?
37.68
500
What is the radius of a circle with a diameter of 100cm?
50 cm
500
How do you find the circumference of a circle?
Multiply 3.14 x the Diameter 3.14 x D
500
An octagon has eight sides. Each side equals 8 in. What is the perimeter of this octagon?
64 in
500

Circumference of a circle is 21.98. What is the radius?

3.5 cm