Circle Geometry Concepts

Front

What is the diameter of a circle?

Back

A line through the center of a circle.

Front

How do you solve for radius?

Back

Radius (r) = Diameter (d) / 2

Front

How can you solve for diameter?

Back

Diameter (d) = 2 * Radius (r)

Front

What does C represent in the formula C = π·d?

Back

C represents Circumference.

Front

Does this picture show the diameter or radius of a circle?

Back

Diameter.

Front

What is the formula for the circumference of a circle?

Back

C = π·d or C = 2·π·r.

Front

What is the radius of a circle?

Back

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

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius.

Front

What is the area of a circle formula?

Back

Area = π·r².

Front

What is π (Pi)?

Back

A mathematical constant approximately equal to 3.14, representing the ratio of the circumference of a circle to its diameter.