Finding the Circumference 328

Front

What is the value of π (pi) to two decimal places?

Back

3.14

Front

What is the formula for calculating the circumference of a circle?

Back

C = π·d, where C is the circumference and d is the diameter.

Front

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

Back

Circumference of the circle.

Front

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

Back

Diameter of the circle.

Front

What is the circumference of a circle with a diameter of 9 cm?

Back

The circumference is 28.26 cm (C = π·9).

Front

How do you calculate the circumference of a circle if you know the radius?

Back

Use the formula C = 2·π·r, where r is the radius.

Front

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

Back

The diameter is 10 cm (d = C/π).

Front

What is the relationship between diameter and radius?

Back

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

Front

What is the circumference of a circle with a radius of 5 cm?

Back

The circumference is 31.4 cm (C = 2·π·5).

Front

What is the definition of circumference?

Back

The distance around a circle.