Circumference and Area of Circles

Front

What is the definition of a circle?

Back

A circle is a shape consisting of all points in a plane that are a fixed distance (radius) from a central point (center).

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 edge.

Front

What is the diameter of a circle?

Back

The diameter is the distance from one edge of the circle to the opposite edge, passing through the center. It is twice the radius.

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle.

Front

What is the formula for finding the circumference of a circle?

Back

Front

What is the area of a circle?

Back

The area is the space inside the circle.

Front

What is the formula for finding the area of a circle?

Back

Front

If the radius of a circle is 4 cm, what is the area?

Back

The area is 50.24 cm².

Front

If the radius of a circle is 8 inches, what is the circumference?

Back

The circumference is 50.24 inches.

Front

What does pi (π) represent in circle calculations?

Back

Pi (π) is a constant approximately equal to 3.14, used in formulas for circumference and area of circles.