Circles, Pi

The radius of a circle is _______________________.

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

• The measurement around the circle

• The measurement from and edge of the circle to another edge through the center

• A line perpendicular to the diameter of the circle

The perimeter of a circle is usually called the...

• radius

• diameter

• circumference

• area

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

What is the definition of pi?

• The ratio of a circle's circumference to its diameter

• The ratio of a circle's radius to its diameter

• The ratio of a circle's area to its diameter

• The ratio of a circle's circumference to its are

What is the "formal" definition of pi?

• 22/7

• 3.1415926

• the ratio of a circle's circumference to its diameter

• the surface area of a sphere of diameter 22/7

What number is pi?

• 41

• 00

• 3.14

• 5.14

How is Pi defined?

• The ratio of the diameter of a circle to its circumference

• The ratio of the circumference of a circle to its diameter

• The ratio of the radius of a circle to its circumference

• The ratio of the circumference of a circle to its radius

What digits do we use for Pi?

• 31.4

• 3.14

• 314

What is the diameter?

• 8

• 16

• 10

• 4