Calculate Circle Measurements

Front

What does d represent in the formula: C = π·d?

Back

diameter

Front

What number represents π?

Back

3.14

Front

If my radius is 10ft, what is my diameter?

Back

20ft

Front

If my diameter is 19 inches, what is my radius?

Back

9.5 inches

Front

If my diameter is 90cm, what is my circumference?

Back

282.6cm

Front

What is the formula to calculate the circumference of a circle?

Back

C = π·d or C = 2·π·r

Front

What is the relationship between radius and diameter?

Back

Diameter is twice the radius (d = 2·r).

Front

If the circumference of a circle is 31.4cm, what is the diameter?

Back

10cm

Front

What is the value of π to two decimal places?

Back

3.14

Front

If the radius of a circle is 5cm, what is the circumference?

Back

31.4cm