Circumference and Area of Circles

Front

What is the formula to calculate the radius from the diameter?

Back

Radius = Diameter / 2

Front

What is the formula for the circumference of a circle?

Back

Circumference = π × Diameter or Circumference = 2 × π × Radius

Front

What is the formula for the area of a circle?

Back

Area = π × Radius²

Front

If the radius of a circle is 3 meters, what is the diameter?

Back

Diameter = 2 × Radius = 6 meters

Front

If the circumference of a circle is 31.4 meters, what is the diameter?

Back

Diameter = Circumference / π ≈ 10 meters

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the length of the radius.

Front

What is the diameter of a circle with a radius of 4 meters?

Back

Diameter = 2 × Radius = 8 meters

Front

What does the term 'circumference' refer to?

Back

Circumference is the distance around a circle.

Front

What does the term 'area' refer to in the context of a circle?

Back

Area is the space contained within the circle.

Front

If a circle has an area of 50.24 m², what is the radius?

Back

Radius = √(Area / π) ≈ 4 meters