Circumference & Area of Circles

Circumference & Area of Circles

Multiple Choice

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

Multiple Select

What two formulas can you use to find the circumference?

• C = π·d

• C = π·r²

• C = 2·π·r

• C = d²

Multiple Choice

Find the circumference of the circle.

• 78.5 cm

• 15.7 cm

• 7.85 cm

• 19.6 cm

Multiple Choice

The formula for the area of a circle is...

• $$A=\pi d^2$$  

• $$A=2\pi r$$  

• $$A=\pi\cdot d$$  

• $$A=\pi r^2$$  

Multiple Choice

Find the area.

• $$6.28km^2$$  

• $$18.84yd^2$$  

• $$3.14yd^2$$  

• $$12.56km^2$$  

Math Response

I can calculate the area of a circle given its radius or diameter.

What is the area of the circle shown?

Type answer here

Correct Answer: 113.04

Deg^°

Rad