Circle - Area and Circumference

Front

What is the formula to find the radius of a circle?

Back

The radius can be found using the formula: radius = diameter / 2.

Front

What is the formula for the area of a circle?

Back

The area of a circle is calculated using the formula: Area = π * r², where r is the radius.

Front

What is the formula for the circumference of a circle?

Back

The circumference of a circle is calculated using the formula: Circumference = 2 * π * r, where r is the radius.

Front

What does π (pi) equal?

Back

π (pi) is approximately equal to 3.14.

Front

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

Back

The diameter is 20 meters (diameter = 2 * radius).

Front

If the diameter of a circle is 30 meters, what is the radius?

Back

The radius is 15 meters (radius = diameter / 2).

Front

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

Back

The area is approximately 153.86 square meters (Area = π * 7²).

Front

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

Back

The circumference is approximately 31.4 meters (Circumference = 2 * π * 5).

Front

How do you convert diameter to radius?

Back

To convert diameter to radius, divide the diameter by 2.

Front

What is the relationship between diameter and circumference?

Back

The circumference is equal to π times the diameter (Circumference = π * diameter).