Area of Circles

Front

What does area mean?

Back

The amount of space inside a shape.

Front

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

Back

Area = π × r², where r is the radius.

Front

What is the diameter of a circle?

Back

The distance across the circle through its center, equal to twice the radius.

Front

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

Back

78.5 in² (using Area = π × r²).

Front

What is π (pi)?

Back

A mathematical constant approximately equal to 3.14, used in calculations involving circles.

Front

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

Back

Radius = Diameter ÷ 2.

Front

What is the area of a circle with a diameter of 10 inches?

Back

78.5 in².

Front

What part of the circle do they give you in area problems?

Back

Radius.

Front

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

Back

153.94 cm² (using Area = π × r²).

Front

If the radius of a circle is doubled, how does the area change?

Back

The area increases by a factor of four.