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.

Tags

CCSS.HSG.C.A.2

Front

If the radius of a circle is 18m, what is the diameter?

Back

The diameter is 36m.

Tags

CCSS.7.G.B.4

Front

Is the red line a radius or diameter of the circle?

Back

It is a radius.

Front

What is the relationship between radius and diameter?

Back

The diameter is twice the length of the radius.

Tags

CCSS.7.G.B.4

Front

Calculate the diameter of a circle with a radius of 15m.

Back

The diameter is 30m.

Tags

CCSS.7.G.B.4

Front

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

Back

The radius is 8m.

Tags

CCSS.7.G.B.4

Front

What is the formula to calculate the diameter from the radius?

Back

Diameter = 2 x Radius.

Tags

CCSS.7.G.B.4

Front

What is the formula to calculate the radius from the diameter?

Back

Radius = Diameter / 2.

Tags

CCSS.7.G.B.4

Front

If a circle has a radius of 10cm, what is its diameter?

Back

The diameter is 20cm.

Tags

CCSS.7.G.B.4