103 Independent Task Circumference

Front

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

Back

Circumference = 2 × π × radius or Circumference = π × diameter.

Front

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

Back

5 cm.

Front

What does the term 'diameter' refer to in a circle?

Back

The diameter is the distance across the circle through its center, equal to twice the radius.

Front

If a circle has a radius of 7 cm, what is its diameter?

Back

14 cm.

Front

What is the relationship between radius and diameter?

Back

Diameter = 2 × radius.

Front

What does 'circumference' mean?

Back

Circumference is the distance around a circle.

Front

If the diameter of a circle is 14 cm, what is its radius?

Back

7 cm.

Front

What is the circumference of a circle with a radius of 10 cm?

Back

Circumference = 2 × π × 10 cm ≈ 62.8 cm.

Front

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

Back

Radius = Circumference / (2 × π).

Front

What is the diameter of a circle with a radius of 12 inches?

Back

24 inches.