Calculate circle area with diameter
[DOC File]Unit 4: Circles and Area
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through to p.150 on how to develop the formula for an area of a circle. Remember π = 3.14. Area of a Circle = π × r × r . and r = radius. Area = π r 2 * Since its area the units are still squared. Examples: 1. Find the area of each circle. Round answers to the nearest tenth…one decimal place. a). Area = π × r × r. 5 cm b). diameter = Area = π × r × r
[DOC File]Example 1: - ASU
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A radius of a circle is half of a diameter (i.e. a segment that from one point on the circle to the center of the circle). Example 9: Find the perimeter and area of the circle below. Solution: The number 11 in the figure above is the length of the diameter of this circle. We …
[DOC File]The radius, diameter, circumference, and area of a circle
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Feb 14, 2012 · a) The circumference of a circle with a diameter of 15 cm. b) The radius of a circle with a diameter of 480 in. c) The circumference of a circle with a radius of 320 cm. d) The diameter of a circle with a radius of 522 ft. The radius, diameter, or circumference of a circle is given. Find the missing measures. Show your work
[DOC File]Lesson #1: Area of Circles
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The formula to find the area of a . The diameter of a circle is 2 times the radius. Find the area of the circle. r = 5 in. Substitute into the area formula. . Example 1: Solve for the area of a circle with a radius equal to 4 meters. (1) Area = 3.14 x (4 x 4) Apply the amounts given in the problem to the formula.
[DOC File]Circles: circumference and area worksheet
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1. Find the circumference of a circle of radius: (a) 4 cm (b) 3 cm (c) 6 cm (d) 2.5 cm. 2. Calculate the circumference of a circle with diameter: (a) 6 m (b) 10 m (c) 5.6 m (d) 30 m. 3. Work out the area of a circle of radius: (a) 5 cm (b) 6 cm (c) 8 cm (d) 10 cm. 4.
[DOC File]Lesson Title: Math – Use proportions to compare circle ...
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Comparing a circle’s circumference with its area and a circle’s radius with its area. Materials:-different size hula hoops or other circular object-string-meter stick. Procedure: Using the string, determine the diameter of the hoop. Calculate the circumference. Calculate the area. Hula. Hoop Diameter Circumference. C = πd Area
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