Radius and Diameter REVIEW

Front

What is the definition of radius?

Back

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

Front

What is the definition of diameter?

Back

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

Front

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

Back

The diameter is 10 mm (Diameter = 2 x Radius).

Front

If the diameter of a circle is 16 mm, what is the radius?

Back

The radius is 8 mm (Radius = Diameter / 2).

Front

Is the line segment connecting two points on a circle's edge a radius or diameter?

Back

It can be a radius if it connects the center to the edge, or a diameter if it connects two points through the center.

Front

What is the relationship between radius and diameter?

Back

The diameter is always twice the length of the radius.

Front

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

Back

The radius is 10 mm.

Front

What is the formula to calculate the diameter if the radius is known?

Back

Diameter = 2 x Radius.

Front

What is the formula to calculate the radius if the diameter is known?

Back

Radius = Diameter / 2.

Front

If the radius of a circle is increased by 3 mm, how does it affect the diameter?

Back

The diameter increases by 6 mm (since Diameter = 2 x Radius).