Intro to Area of a Circle

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

• radius

• diameter

• circumference

• area

What is the value of the radius?

• 10

• 3.14

• 5

• 15

What does this π mean?

• it's just the letter R

• pi = 3.14

• It's the letter R in cursive

• radius

What is the formula to find the area of a circle? ​ (a)  

Select the correct formula for finding area of a circle

• l x w

• b x h

A baker is making a giant pizza with a diameter of 42 inches. a large jar of tomato sauce can cover 90 square inches of pizza. How many jars of tomato sauce does the baker need to buy to cover all the pizza?

Mathematical Equivalence

ON

Match the following definitions to the terms:

• How much space a circle takes up

• The distance around a circle

• Units of circumference

• Circumference of a circle

• square units (units²)

• Area of a circle

• feet, cm, inches

• Units of area

Select the correct formula for finding area of a circle

(a)  

• l x w

• b x h

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

• radius

• diameter

• circumference

• area

If you multiply π × r² then you will get the...

• Circumference

• Area

• Radius

• Diameter