Radius and Diameter

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

What is the diameter of a circle?

Back

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

Front

How do you calculate the diameter if you know the radius?

Back

Diameter = 2 x Radius.

Front

How do you calculate the radius if you know the diameter?

Back

Radius = Diameter / 2.

Front

If the radius of a circle is 5 km, what is the diameter?

Back

The diameter is 10 km.

Front

If the diameter of a circle is 20 km, what is the radius?

Back

The radius is 10 km.

Front

What is the relationship between radius and diameter?

Back

The diameter is always twice the length of the radius.

Front

Is 5.4 km a radius or diameter?

Back

Radius.

Front

Is 21.60 km a radius or diameter?

Back

Diameter.

Front

If a circle has a radius of 2.7 km, what is its diameter?

Back

The diameter is 5.4 km.