Review of Circles

Front

What is the center of a circle?

Back

The point that is equidistant from all points on the circle.

Front

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

Back

Circumference = 2 × π × r (where r is the radius).

Front

What is a diameter?

Back

A line segment that passes through the center of the circle and has its endpoints on the circle.

Front

What is a radius?

Back

A line segment from the center of the circle to any point on the circle.

Front

What is a chord?

Back

A line segment with both endpoints on the circle.

Front

What is the area of a circle?

Back

Area = π × r² (where r is the radius).

Front

How do you calculate the circumference if the diameter is known?

Back

Circumference = π × d (where d is the diameter).

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the length of the radius (d = 2r).

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.

Front

What is the distance around a circle called?

Back

Circumference.