Radius and Diameter

Front

What is the definition of diameter in a circle?

Back

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

Tags

CCSS.HSG.C.A.2

Front

How is the radius of a circle defined?

Back

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

Front

If the diameter of a circle is 80 ft, what is the radius?

Back

The radius is 40 ft, since the radius is half of the diameter.

Tags

CCSS.7.G.B.4

Front

What is the relationship between radius and diameter?

Back

The radius is half the length of the diameter.

Tags

CCSS.7.G.B.4

Front

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

Back

Multiply the radius by 2 to find the diameter.

Tags

CCSS.7.G.B.4

Front

What is the formula for finding the circumference of a circle using the diameter?

Back

Circumference = π × diameter.

Tags

CCSS.7.G.B.4

Front

What is the formula for finding the area of a circle using the radius?

Back

Area = π × radius².

Tags

CCSS.7.G.B.4

Front

If a circle has a radius of 6 m, what is its diameter?

Back

The diameter is 12 m.

Tags

CCSS.7.G.B.4

Front

Is the line segment connecting two points on the circumference of a circle that passes through the center a radius or diameter?

Back

It is a diameter.

Front

If the diameter of a circle is 70 m, what is the radius?

Back

The radius is 35 m.

Tags

CCSS.7.G.B.4