Area of Circles

Area of Circles

This quizizz will review what we learned on Monday. If you have questions feel free to send me a text.

Area of Circles

The area (A) of a circle can be found by multiplying 𝛑 and the square of the circle's radius r.

Steps to find Area 

• Identify the radius 

• If you are given diameter you must divide by 2 to get radius

• Area Substitute radius into the equation $A=\pi r^2$ 

• Using 𝛑 = 3.14, solve for the area

Multiple Choice

What part of the circle do they give you?

• radius

• diameter

Fill in the Blank

What is the size of the radius?

Fill in the Blank

What does

 $3^2=$  

Multiple Choice

What is the area of the circle?

• 1,384.74 in²

• 5,539 in²

• 131.88 in²

• 65.94 in²

Finding Area of a Circle

when given diameter

Multiple Choice

What part of the circle does this problem provide?

• radius

• diameter

Multiple Choice

When solving for area which part of the circle do we need?

 $A=\pi r^2$  

• radius

• diameter

Open Ended

What do we do to the diameter to get the value of the radius?

To get the radius for this problem we must divide the diameter by 2. 8/2=4

Multiple Choice

What is the area of the circle?

• 37.68 m sq

• 18.84 m sq

• 452.14 m sq

• 113.04 m sq

Multiple Choice

• 100.48 ft sq

• 50.24 ft sq

• 200.96 ft sq

• 803.84 ft sq

Multiple Choice

What is the area of the circle?

• 7.07 ft sq

• 28.26 ft sq

• 9.42 ft sq

• 4.71 ft sq

Multiple Choice

What is the area of the circle?

• 15.7 cm sq

• 78.5 cm sq

• 31.4 cm sq

• 47.1 cm sq