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Do NowAIM: Area of Circles

Weekly Quiz #13

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Weekly Quiz #13Use the formulas we learned in class and show all work.

1.) What is the sum of the measures of the angles of a 7 sided polygon?

2.) Find the area of the following figures.

a.) b.)

11 in

5 in

5 m

3 m

6 m

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Homework: Pages 426-427 #17-24 all, 33-41 all

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Anticipatory Set: Fill the What I Know and What I Want to Learn sections of the following KWL Chart based on your knowledge of finding the area of a circle.

What I Know What I Want to Learn What I Learned

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Area of a Circle Formula

1.) A = πr2

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1  Find the area of the following circle. Use the Pi Button and round your final answers to the nearest hundredth.

7 yd

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Find the area of the following circle. Use the Pi Button and round your final answers to the nearest hundredth.

13 cm

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Radius = 153 m

Find the area and leave the answer in Pi notation.

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A 153B 306C 23409D 46818 m2

m2m2m2

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Diameter = 2053 m

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A 2053B 4214809C 4106D 1053702.25

Find the area and leave the answer in Pi notation.

m2m2m2m2

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Determine a method to find the radius or diameter given the area. Explain your method.

Given Radius

Square Radius

Multiply by Pi

You Found Area

Given Area

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If the area of a circle is 56 centimeters2, find the length of the radius and the diameter. Use the Pi Button and round your final answers to the nearest tenth.

Radius = _____

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The area of the Superdome in New Orleans is 362,984 feet2. Find the length of the radius and the diameter of the Superdome. Use the Pi Button and round your final answers to the nearest tenth.

Diameter = ______

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The area of a circle is 81π feet2. Find the radius and diameter.

Radius = _____

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BEFORE YOU LEAVE

Go back to the KWL Chart in the Anticipatory Set and fill in the What I Learned section.

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Homework: Pages 440-441 #6-8 all, 13, 14, 21-24 all, 26, 30-38 all

Mr. Tjersland's Math 7