Sir Cumference and the Dragon of Pi

Circumference is the measure of the distance around the outside of a circle

 

What is another way to describe the circumference?

• Area

• Perimeter

• Angle

Radius is the distance from the center of a circle to the outside edge.

 

Which do you think will be longer on a circle, the radius or the circumference?

• Radius

• Circumference

Diameter is the distance all the way across a circle through the center.

How are the radius and diameter related?

• The radius is half the size of the diameter

• The radius is twice the size of the diameter

• There is no relationship

What part of a circle do two opposite spokes of the wheel represent?

• the radius

• the diameter

• the legs

• the sides

If the radius of a circle is 20cm, what is the diameter? 

• 10cm

• 40cm

• 20cm

If the diameter of a circle is 10cm, what is the radius? 

• 5 cm

• 15 cm

• 20 cm

What does "circumference" mean?

• It is the area of inside a circle.

• It is the distance around a circle.

What is the approximate value of pi?

• 3

• 3.14

• 4.13

The diameter is ______ times the radius.

• 1

• 2

• 3

• 0

 is a symbol from the ________ alphabet.

• Roaman

• Arabic

• Greek