Circumference of a Circle!

Front

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

Back

Circumference = π × diameter (C = πd)

Front

What is the value of π (pi) commonly approximated as?

Back

3.14

Front

If the diameter of a circle is 10 cm, what is the radius?

Back

5 cm (Radius = diameter / 2)

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius

Front

How do you find the circumference if you know the radius?

Back

Circumference = 2 × π × radius (C = 2πr)

Front

What is the diameter of a circle with a radius of 8 cm?

Back

16 cm (Diameter = 2 × radius)

Front

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

Back

10 cm (Diameter = Circumference / π)

Front

What is the circumference of a circle with a diameter of 4 cm?

Back

12.56 cm (C = πd = 3.14 × 4)

Front

What is the radius of a circle with a circumference of 62.8 cm?

Back

10 cm (Radius = Circumference / 2π)

Front

If the radius of a circle is doubled, what happens to the circumference?

Back

The circumference also doubles.