Parts of a Circle

Front

What is the formula to calculate the area of a circle?

Back

Area = π r², where r is the radius.

Tags

CCSS.7.G.B.4

Front

What is the formula to calculate the circumference of a circle?

Back

Circumference = π d or Circumference = 2π r, where d is the diameter and r is the radius.

Tags

CCSS.7.G.B.4

Front

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

Back

The radius is 5 ft.

Tags

CCSS.7.G.B.4

Front

What is the diameter of a circle if the radius is 12 cm?

Back

The diameter is 24 cm.

Tags

CCSS.7.G.B.4

Front

What do we call the distance around a circle?

Back

Circumference.

Front

What is the space contained inside a circle called?

Back

Area.

Front

If you multiply ½ × d, what do you get?

Back

Radius.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius.

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 7 m, what is the area?

Back

Area = π (7)² = 49π m².

Tags

CCSS.7.G.B.4

Front

If the circumference of a circle is 31.4 m, what is the diameter?

Back

Diameter = 31.4 / π ≈ 10 m.

Tags

CCSS.7.G.B.4