Area and Circumference of Circles

Front

What is the formula for the circumference of a circle?

Back

The circumference (C) of a circle is given by the formula: C = 2πr, where r is the radius.

Tags

CCSS.7.G.B.4

Front

What is the formula for the area of a circle?

Back

The area (A) of a circle is given by the formula: A = πr², where r is the radius.

Tags

CCSS.7.G.B.4

Front

If a circle has a radius of 5, what is its circumference in terms of pi?

Back

C = 10π.

Tags

CCSS.7.G.B.4

Front

If a circle has a radius of 3, what is its area in terms of pi?

Back

A = 9π.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

The diameter (d) of a circle is twice the radius: d = 2r.

Tags

CCSS.7.G.B.4

Front

What is the distance around a circle called?

Back

The distance around a circle is called the circumference.

Front

If the diameter of a circle is 12ft, what is the radius?

Back

The radius is 6ft.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a diameter of 10?

Back

C = 10π.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 4?

Back

A = 16π.

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is doubled, how does the area change?

Back

The area increases by a factor of four.

Tags

CCSS.7.G.B.4