Circle Measurements Test Review

Front

What is the formula for the area of a circle?

Back

Area = π × r², where r is the radius.

Front

What is the formula for the circumference of a circle?

Back

Circumference = π × d, where d is the diameter.

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius (d = 2r).

Front

If the radius of a circle is 5 cm, what is the diameter?

Back

Diameter = 2 × 5 cm = 10 cm.

Front

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

Back

Area = π × (3 m)² ≈ 28.27 m².

Front

What is the circumference of a circle with a diameter of 10 inches?

Back

Circumference = π × 10 inches ≈ 31.42 inches.

Front

What is the radius of a circle with a diameter of 12 feet?

Back

Radius = 12 feet / 2 = 6 feet.

Front

What is the area of a circle with a diameter of 8 cm?

Back

Area = π × (4 cm)² ≈ 50.27 cm².

Front

What does the term 'circumference' refer to?

Back

Circumference is the distance around a circle.

Front

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

Back

Area = π × (7 inches)² ≈ 153.94 inches².