Circles: Circumference and Area

Front

What is the diameter of a circle?

Back

The diameter is the distance across a 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

What is the formula for the circumference of a circle?

Back

Front

What is the formula for the area of a circle?

Back

Front

If the radius of a circle is 5 cm, what is the circumference?

Back

Front

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

Back

Front

What is the relationship between diameter and radius?

Back

Front

What is π (pi)?

Back

π (pi) is a mathematical constant approximately equal to 3.14, representing the ratio of the circumference of a circle to its diameter.

Front

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

Back

Front

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

Back