7.3.a: Radius, Diameter, Circumference

Front

What is the diameter of a circle if the radius is 10ft?

Back

20ft

Front

How do you convert radius to diameter?

Back

Multiply by 2

Front

What is the value of Pi (π) when dividing the circumference of a circle by its diameter?

Back

Pi (π)

Front

What is 5 squared (5^2)?

Back

25

Front

If a circular window has a diameter of 6 meters, what is its radius?

Back

3 m

Front

What is the formula for the circumference of a circle?

Back

C = π × d or C = 2 × π × r

Front

What is the relationship between radius and circumference?

Back

Circumference is directly proportional to the radius.

Front

If the diameter of a circle is 12cm, what is the radius?

Back

6cm

Front

What is the circumference of a circle with a radius of 4m?

Back

8π m or approximately 25.13m

Front

What does the term 'circumference' refer to?

Back

The distance around a circle.