Circumference and Area Word Problems

Front

What is the formula for calculating the circumference of a circle?

Back

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

Front

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

Back

Area = π × radius².

Front

If the radius of a circle is 4 inches, what is the circumference?

Back

Circumference = 2 × π × 4 = 25.12 inches.

Front

If the radius of a circle is 1 foot, what is the area?

Back

Area = π × 1² = 3.14 square feet.

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × radius.

Front

If the diameter of a pizza is 12 inches, what is the circumference?

Back

Circumference = π × 12 = 37.68 inches.

Front

If the diameter of a cookie is 16 inches, what is the area?

Back

Area = π × (16/2)² = 200.96 square inches.

Front

If the diameter of a tray is 18 inches, what is the area?

Back

Area = π × (18/2)² = 254.34 square inches.

Front

What does π (pi) represent in circle calculations?

Back

π (pi) is a constant approximately equal to 3.14, used in calculations involving circles.

Front

How do you convert diameter to radius?

Back

Radius = Diameter ÷ 2.