Circumference (11/29)

Front

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

Back

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

Front

What is the value of π (pi) approximately?

Back

π is approximately 3.14.

Front

If the diameter of a circle is 10 meters, what is its circumference?

Back

Circumference = π × diameter = 3.14 × 10 = 31.4 meters.

Front

What is the relationship between diameter and radius?

Back

The radius is half of the diameter. Radius = diameter / 2.

Front

How do you find the diameter if you know the circumference?

Back

Diameter = Circumference / π.

Front

What is the circumference of a circle with a radius of 5 meters?

Back

Circumference = 2 × π × radius = 2 × 3.14 × 5 = 31.4 meters.

Front

If a circle has a circumference of 62.8 meters, what is its diameter?

Back

Diameter = Circumference / π = 62.8 / 3.14 = 20 meters.

Front

What is the circumference of a circle with a diameter of 8 units?

Back

Circumference = π × diameter = 3.14 × 8 = 25.12 units.

Front

How far does a person run if they complete 4 laps around a circular track with a diameter of 50 meters?

Back

Circumference = π × diameter = 3.14 × 50 = 157 meters. Total distance = 4 × 157 = 628 meters.

Front

What is the approximate circumference of a circle with a diameter of 12 inches?

Back

Circumference = π × diameter = 3.14 × 12 = 37.68 inches.