CIRCLES REVIEW!

Front

What is the diameter of a circle?

Back

The diameter is the distance across a circle through its center, equal to twice the radius.

Front

How do you calculate the circumference of a circle?

Back

Circumference = π × diameter. For a circle with a diameter of 24 inches, Circumference = 3.14 × 24 = 75.36 inches.

Front

What is the formula for the area of a circle?

Back

Area = π × radius².

Front

If a circle has a radius of 4.5 feet, what is its area?

Back

Area = 3.14 × (4.5)² = 63.585 ft².

Front

What is the value of π (pi) used in calculations?

Back

π (pi) is approximately 3.14.

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

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

Back

Radius = diameter ÷ 2. So, radius = 10 ÷ 2 = 5 inches.

Front

What is the circumference of a circle with a radius of 7 inches?

Back

Circumference = 2 × π × radius = 2 × 3.14 × 7 = 43.96 inches.

Front

How do you find the area of a circle with a diameter of 10 inches?

Back

First, find the radius: radius = diameter ÷ 2 = 5 inches. Then, Area = π × radius² = 3.14 × (5)² = 78.5 square inches.

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius: diameter = 2 × radius.