Circumference of a circle.

Front

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

Back

The circumference (C) of a circle is calculated using the formula: C = 2πr, where r is the radius.

Front

If a circle has a radius of 5, what is its circumference?

Back

31.4 (using C = 2πr, C = 2 × 3.14 × 5)

Front

What is the relationship between diameter and radius in a circle?

Back

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

Front

How do you find the circumference of a circle if you know the diameter?

Back

Use the formula: C = πd, where d is the diameter.

Front

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

Back

62.8 cm (using C = 2πr, C = 2 × 3.14 × 10)

Front

If a circle has a diameter of 37, what is its circumference?

Back

116.18 (using C = πd, C = 3.14 × 37)

Front

What is π (pi) approximately equal to?

Back

π is approximately equal to 3.14.

Front

What is the circumference of a circle with a radius of 96?

Back

602.88 (using C = 2πr, C = 2 × 3.14 × 96)

Front

What does the term 'circumference' refer to?

Back

Circumference refers to the distance around the edge of a circle.

Front

If a plate has a diameter of 999, how would you express the formula for its circumference?

Back

C = πd, which can be expressed as 999 × 3.14.