THE LIFE OF PI

PI

THE FACTS

• Pi is an irrational number
• An irrational number is a number that never stops, and has no pattern
• The first few digits are 3.14159
• The ratio of a circle's circumference to its diameter is known as "pi"
• That number is represented by a Greek letter known as "pi"

CIRCUMFERENCE

WHAT IS CIRCUMFERENCE

• The distance around the edge of a circle
• Especially important in geometry

WHAT IS DIAMETER

• Any straight line segment that passes through the center of a circle
• A diameter's endpoints lie on the circle
• Sometimes called the chord of the circle

WHAT CAN WE FIND WITH PI

• The circumference of a circle
• The area of a circle
• The volume of a sphere
• The surface area of a sphere