Radius and Diameter

Front

What is the diameter of a circle?

Back

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

Tags

CCSS.HSG.C.A.2

Front

If the diameter of a circle is 10 in, what is the radius?

Back

5 in

Tags

CCSS.7.G.B.4

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 edge.

Front

If the radius of a circle is 6 ft, what is the diameter?

Back

12 ft

Tags

CCSS.7.G.B.4

Front

What is the relationship between radius and diameter?

Back

The diameter is twice the radius.

Tags

CCSS.7.G.B.4

Front

If the diameter of a circle is 27, what is the radius?

Back

13.5

Tags

CCSS.7.G.B.4

Front

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

Back

Diameter = 2 x Radius

Tags

CCSS.7.G.B.4

Front

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

Back

Radius = Diameter / 2

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle, calculated as C = π x Diameter.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle?

Back

The area is the space contained within the circle, calculated as A = π x Radius².

Tags

CCSS.7.G.B.4