Circles and Pi

Which one of these symbols is Pi?

• π

• ≤

• √

• ∞

The distance from the center of the circle to any point on the circle is called the...

• radius
• diameter
• circumference
• area

The distance across the circle through the center is called the...

• radius
• diameter
• circumference
• area

The distance all the way across the circle is called the...

• radius
• diameter
• circumference
• area

The distance all the way around the circle is called the...

• radius
• diameter
• circumference
• area

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

• radius
• diameter
• circumference
• area

The space contained inside of a circle is called the...

• radius
• diameter
• circumference
• area

If you multiply 2 × r  then you will get the...

• radius
• diameter
• circumference
• area

If you multiply ½ × d  then you will get the...

• radius
• diameter
• circumference
• area

If a circle has a radius of 10 ft. then which statement is true?

• The radius is 5 ft. 
•  The diameter is 5 ft
• The radius is 20 ft.
• The diameter is 20 ft.