Circumference & Area of Circles

Front

What is the circumference of a circle?

Back

The circumference is the distance around a circle.

Front

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

Back

Front

What is the area of a circle?

Back

The area is the space contained within the circle.

Front

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

Back

Front

What is the diameter of a circle?

Back

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

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

If the radius of a circle is 7 cm, what is the circumference?

Back

The circumference is @@C = 2 ext{π}(7) ext{ cm} \\ C \\approx 43.98 ext{ cm}$$.

Front

If the diameter of a circle is 10 cm, what is the area?

Back

The area is @@A = ext{π}(rac{10}{2})^2 \\ A \\approx 78.54 ext{ cm}^2$$.

Front

What is the relationship between diameter and radius?

Back

Front

What is the value of π (pi) approximately?

Back

The value of π is approximately 3.14.