Area and Circumference Practice

Front

What is the formula for the circumference of a circle?

Back

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

Tags

CCSS.7.G.B.4

Front

What is the formula for the area of a circle?

Back

Area = π × radius².

Tags

CCSS.7.G.B.4

Front

What does π (pi) represent in relation to a circle?

Back

π is the ratio of the circumference of a circle to its diameter.

Tags

CCSS.HSG.GMD.A.1

Front

What is the radius of a circle?

Back

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

Front

What is the diameter of a circle?

Back

The distance across the circle through its center, equal to 2 times the radius.

Tags

CCSS.HSG.C.A.2

Front

If the radius of a circle is 7 inches, what is the circumference?

Back

Circumference = 2 × π × 7 ≈ 43.98 inches.

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 5 inches, what is the area?

Back

Area = π × 5² ≈ 78.54 square inches.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius.

Tags

CCSS.7.G.B.4

Front

How do you convert the radius to diameter?

Back

Multiply the radius by 2.

Tags

CCSS.7.G.B.4

Front

What is the approximate value of π?

Back

π ≈ 3.14.

Tags

CCSS.HSG.GMD.A.1