Area and Circumference of Circles

Presentation

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Mathematics

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8th Grade

•

Practice Problem

•

Medium

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CCSS

7.G.B.4, RL.2.6, HSG.CO.A.1

Standards-aligned

Cole Neal

Used 116+ times

FREE Resource

7 Slides • 14 Questions

Area and Circumference of Circles

Multiple Choice

How are you doing today?

Great

Wonderful

Awesome

Splendid

Multiple Choice

What does a circle look like?

Multiple Choice

What would be the perimeter of a square with side lengths of 5? What would the area be?

Perimeter 20; Area 20

Perimeter 20; Area 25

Perimeter 25; Area 25

Perimeter 10; Area 20

Area and Perimeter?

Multiple Choice

What is the perimeter/area?

Perimeter 32; Area 26

Perimeter 26; Area 32

Perimeter 26; Area 40

Perimeter 40; Area 26

Important Parts of a Circle

Radius- the distance between the center of the circle and any point on the circle itself
Diameter- the distance between any two points on a circle which crosses through the center of the circle
Circumference- the distance around a circle
Area- the amount of space enclosed by the circle

Multiple Choice

Which of the following is most similar to the circumference of a circle?

Area

Perimeter

Volume

Surface Area

Multiple Choice

Which of the following is true about the diameter of a circle?

It is always half of the radius

It is always twice the radius

It is always equal to the circumference

It is always twice the circumference

Circumference and Area Formulas for a Circle

Multiple Select

Which of the following represents the formula for the circumference of a circle? (Select two)

$C=2\pi r$

$C=\pi r$

$C=\pi d$

$C=2\pi d$

Find the area and circumference of the circle

Multiple Choice

Could the following dimensions exist for a circle? Radius=8 and Diameter=12

Yes

Multiple Choice

Given that the circumference of a circle is 62, what would be the radius of that circle? The diameter? Round to the nearest hundreth.

radius- 9.87/ diameter- 19.75

radius- 19.75/ diameter- 9.87

radius- 19.75/ diameter- 39.5

radius- 4.94/ diameter- 9.87

Open Ended

Given that the circumference of a circle is 100, what is the radius and the diameter?

Type response here

Given the area of a circle is 78.5, what is the diameter of that circle?

Multiple Choice

Given the area of a circle is 153.86, what is the diameter of that circle?

3.5

Multiple Choice

Find the circumference of the circle whose area is 64 $\pi$

$16\pi$

$8\pi$

Open Ended

Find the area of the circle whose circumference is 6 $\pi$

Type response here

Homework for Tonight 3/30/21

Circles on Google Classroom

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Area and Circumference of Circles

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