Target 1: Defining and Labeling Parts of a Circle

The definition of a true circle is:

• A set of points in a plane that are all the same distance from a given point, called the center.

• A round looking polygon with 360 degrees.

• Any polygon with curved lines.

• A plane figure that looks like a smashed basketball.

Tags

CCSS.HSG.CO.A.1

A segment that has one endpoint at the center and the other endpoint on the circle is called:

• Diameter

• Circumference

• Radius

• Chord

Tags

CCSS.HSG.C.A.2

A segment that passes through the center and has both endpoints on the circle is:

• Diameter

• Circumference

• Radius

• Arc

Tags

CCSS.HSG.C.A.2

The radius is ___________ the length of the diameter.

• twice

• half

• three times

• equal to

Tags

CCSS.HSG.C.A.2

The word used to describe the perimeter of a circle is:

• area

• volume

• diameter

• circumference

How is pi calculated?

• area of a circle x 3.14

• circumference / diameter

• diameter x circumference

• circumference - diameter

Why is pi an irrational number?

• it's angry and rude

• it's hard to deal with

• it's never ending and non-repeating

• no one understands it

What Greek letter is used to represent the number pi?

• 
• 
• 
• 

Why is pi day celebrated on March 14th?

• Because it's Albert Einstein's birthday.

• It's not too hot and not too cold.

• Because 3 and 14 are the first few digits of pi.

• Because someone randomly selected that date from a hat.

How would you name the circle above?

• Circle HF

• Circle B

• Circle A

• Circle HAF