This document provides instruction on calculating the area of circles using the formula Area = πr^2. It includes examples of finding the area given the radius or diameter, as well as calculating the radius or diameter given the area. It emphasizes using a pi button to calculate area and rounding final answers to the nearest hundredth or tenth. The document is designed to teach students the key concepts and skills for solving area of circle problems.

1. AIM: Area of Circles
Do Now
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2. Homework: Pages 426-427 #17-24 all, 33-41 all
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3. 3

4. 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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5. Area of a Circle Formula
1.) A = πr2
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6. 1
Find the area of the following circle. Use the Pi Button and
round your final answers to the nearest hundredth.
7y
d
6

7. 2
Find the area of the following circle. Use the Pi Button and
round your final answers to the nearest hundredth.
cm
13
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8. 3
A 153
m2
B 306 m2
C 23409 m2
D 46818 m2
Find the area and leave the answer in Pi notation.
Radius = 153 m
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9. 4
A 2053 m2
B 4214809 m2
C 4106 m2
D 1053702.25 m2
Find the area and leave the answer in Pi notation.
Diameter = 2053 m
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10. Determine a method to find the radius or diameter given the
area. Explain your method.
Given Radius Given Area
Square Radius
Multiply by Pi
You Found Area
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11. 5
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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12. 6
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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13. 7
The area of a circle is 81π feet2. Find the radius and
diameter.
Radius = _____
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14. 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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15. Mr. Tjersland's Math 7
Homework: Pages 440-441 #6-8 all, 13, 14, 21-24 all, 26, 30-38 all
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16. AIM: Area of Circles
Area of a Circle Formula
1.) A = πr2
Find the area of the following circle. Use the Pi Button and
round your final answers to the nearest hundredth.
7y
d
16

17. AIM: Area of Circles
Area of a Circle Formula
1.) A = πr2
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 = _____
17