Circumference and Area Word Problems

Front

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

Back

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

Front

How do you calculate the area of a circle?

Back

Area = π × radius².

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius (Diameter = 2 × radius).

Front

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

Back

Radius = 5 inches.

Front

What is π (pi)?

Back

π (pi) is a mathematical constant approximately equal to 3.14, representing the ratio of a circle's circumference to its diameter.

Front

How do you find the circumference of a circle with a radius of 4 inches?

Back

Circumference = 2 × π × 4 = 8π inches (approximately 25.12 inches).

Front

What is the area of a circle with a radius of 3 feet?

Back

Area = π × 3² = 9π ft² (approximately 28.27 ft²).

Front

If a circular pizza has a diameter of 12 inches, what is its circumference?

Back

Circumference = π × 12 = 12π inches (approximately 37.68 inches).

Front

What is the area of a pizza with a diameter of 10 feet?

Back

Area = π × (5)² = 25π ft² (approximately 78.54 ft²).

Front

How do you approximate the circumference of a circular path with a diameter of 30 meters using π = 3.14?

Back

Circumference = 3.14 × 30 = 94.2 meters.