PI 3.14

What defines a circle in geometry?

• A shape with one side and one angle

• A set of points forming a square

• A set of points all at the same distance from a center point

• A shape with four equal sides

What is the distance from the center of a circle to any point on its perimeter called?

• Pi

• Radius

• Circumference

• Diameter

How is the diameter of a circle related to its radius?

• It is half as long

• It is the same length

• It is twice as long

• It is four times as long

What special number represents the ratio of a circle's circumference to its diameter?

• The square root of 2

• Pi (π)

• The golden ratio (φ)

• Euler's number (e)

Why is Pi considered an irrational number?

• It can be accurately calculated

• Its decimal digits never end and never repeat

• It has a finite number of decimal places

• Its value is exactly 3