Parts of a Circle

Front

What is the circumference of a circle?

Back

The length around a circle.

Tags

CCSS.7.G.B.4

Front

What is the radius of a circle?

Back

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

Front

What is the diameter of a circle?

Back

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

Tags

CCSS.HSG.C.A.2

Front

How do you calculate the circumference of a circle?

Back

Circumference = 2 × π × radius or Circumference = π × diameter.

Tags

CCSS.7.G.B.4

Front

What part of the circle does the minute hand of a clock represent?

Back

The radius.

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius.

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 58 cm, what is the diameter?

Back

Diameter = 2 × 58 cm = 116 cm.

Tags

CCSS.7.G.B.4

Front

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

Back

Area = π × radius².

Tags

CCSS.7.G.B.4

Front

What is π (pi)?

Back

A mathematical constant approximately equal to 3.14, used in calculations involving circles.

Tags

CCSS.HSG.GMD.A.1

Front

What is a chord in a circle?

Back

A line segment whose endpoints lie on the circle.