Circumference

Front

What is the definition of circumference?

Back

The circumference is the distance around a circle.

Front

What is a chord in a circle?

Back

A chord is a line segment that connects two points on the circle.

Front

How do you calculate the circumference of a circle?

Back

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

Front

What is the value of π (pi) commonly approximated as?

Back

π is commonly approximated as 3.14.

Front

If a circle has a diameter of 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.

Front

If a Ferris wheel has a diameter of 70 meters, how far does a rider travel in one full rotation?

Back

Circumference = π × diameter = 3.14 × 70 = 219.8 meters.

Front

What is the circumference of a circular garden with a radius of 5 meters?

Back

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

Front

How far does a bike travel if its wheel has a diameter of 30 inches and it makes 15 complete rotations?

Back

Circumference = π × diameter = 3.14 × 30 = 94.2 inches. Total distance = 94.2 × 15 = 1413 inches.

Front

Convert the circumference of a quarter with a radius of 2.5 cm to meters. What is the answer?

Back

Circumference = 2 × π × radius = 2 × 3.14 × 2.5 = 15.7 cm = 0.157 m.