Area of Circles
Presentation
•
Mathematics
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7th Grade
•
Practice Problem
•
Medium
Justin Nihart
Used 2+ times
FREE Resource
7 Slides • 8 Questions
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2
Area of Circles
3
Example #1
Find the area of the circle.
4
Example #2
Find the area of a circle with a diameter of 28 inches.
5
Math Response
Use question (a.) on p. 624 from your book.
Find the area of a circle with a radius of 3.2 centimeters. Use 3.14 for pi and round to the nearest tenth.
6
Poll
7
Example #3
Find the area of the face of the Virginia quarter with a
diameter of 24 millimeters. Use 3.14 and round to the nearest tenth if necessary.
8
Math Response
Use question (b.) on p. 625.
The bottom of a circular swimming pool with a diameter of 30 feet is painted blue. How many square feet are blue. Use 3.14 for pi and round to the nearest tenth.
9
Example #4 - Semicircles
Find the area of the semicircle. Use 3.14 for pi and round to the nearest tenth.
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Math Response
Use question (c.) on p. 625.
Find the approximate area of a semi circle with a radius of 6 centimeters.
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Class Practice
Open your book to p. 626 - 627. The next few problems will hop around on those two pages. Make sure you are writing the formula and showing your work!
12
Math Response
#3 on p. 626
Find the area of circle with diameter of 16 meters. Use 3.14 for pi and round to the nearest tenth.
13
Math Response
#11 on p. 627
Find the area of the given semicircle. Use 3.14 for pi and round to the nearest tenth.
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Math Response
Use question #2 on p. 627
Find the area of the given circle. Use 3.14 for pi and round to the nearest tenth.
15
Math Response
Use question #12 on p. 627.
The tunnel opening shown is a semicircle. Find the area, to the nearest tenth, of the opening of the tunnel enclosed by the semicircle.
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