Circles

Front

What is the value of PI?

Back

PI equals both 22/7 and 3.14...

Tags

CCSS.HSG.GMD.A.1

Front

What do we call the distance around a circle?

Back

The distance around a circle is called the circumference.

Tags

CCSS.7.G.B.4

Front

What is the distance from one endpoint to another that passes through the center of a circle?

Back

The distance is called the diameter.

Front

What is the ratio of a circle's circumference to its diameter?

Back

The ratio is known as pi.

Tags

CCSS.HSG.GMD.A.1

Front

If a circle has a radius of 1 inch, what is its circumference?

Back

The circumference is 6.28 inches.

Tags

CCSS.7.G.B.4

Front

What is the formula for the circumference of a circle?

Back

The formula is C = 2πr, where r is the radius.

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 circumference.

Front

What is the area of a circle?

Back

The area is calculated using the formula A = πr².

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the length of the radius (D = 2r).

Tags

CCSS.7.G.B.4

Front

What is a chord in a circle?

Back

A chord is a line segment whose endpoints lie on the circle.