Area of Circles

Front

What is the formula to calculate the area of a circle?

Back

Area = π × r², where r is the radius of the circle.

Front

If a circle has a radius of 3 cm, what is its area?

Back

28.26 cm².

Front

What is the diameter of a circle?

Back

The diameter is twice the radius of the circle.

Front

If a circle has a diameter of 6 meters, what is its radius?

Back

3 meters.

Front

How do you convert diameter to radius?

Back

Divide the diameter by 2.

Front

What is the area of a circle with a radius of 9.2 cm?

Back

265.9 cm².

Front

What is the approximate value of π (pi)?

Back

3.14.

Front

If a circle has a radius of 5 cm, what is its area?

Back

78.5 cm².

Front

What is the area of a circle with a diameter of 120 feet?

Back

11304 square feet.

Front

How do you find the area of a circle if you only have the diameter?

Back

First, divide the diameter by 2 to get the radius, then use the formula Area = π × r².