Pre-assessment of circles

Front

What is the formula for finding the circumference of a circle with just the radius?

Back

2πr

Front

What is the distance around a circle called?

Back

Circumference

Front

What is the radius of a circle?

Back

The measurement from the center of a circle to an edge of the circle.

Front

What is a line that goes from one end of the circle to the other and crosses the center point?

Back

Diameter

Front

What is the radius?

Back

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

Front

What is the diameter of a circle?

Back

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

Front

How do you calculate the circumference if you know the diameter?

Back

Circumference = π × diameter.

Front

What is the relationship between radius and diameter?

Back

Diameter = 2 × radius.

Front

What is π (pi)?

Back

A mathematical constant approximately equal to 3.14, used in calculations involving circles.

Front

If the radius of a circle is 14, what is the diameter?

Back

28 (Diameter = 2 × radius).