Calculate radius of circle from circumference
[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. A=πr2 1 2 ...
[DOC File]Lesson plan - Study Island
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Math Lesson: Circles Grade Level: 7 Lesson Summary: Students calculate the circumference, diameter, and radius of a circle and derive the formula for the area of a circle.They consider a real-world question related to the circumference of a basketball and basketball rim. Advanced students research how Eratosthenes determined the circumference of the Earth 2,000 years ago.
[DOC File]Geometry 2-B
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Find the approximate circumference of a circle with . radius = 5cm 25. Find the exact circumference of a circle with . radius = 3cm. 26. Find the exact circumference of a circle with . diameter ... Calculate the . approximate. circumference. _____ If there are nine chairs on the ferris wheel, what is the . …
[DOC File]Circumference, Radius, and Diameter
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The circumference of a circle is 9.7 in. Calculate its diameter. 3b. The circumference of a circle is 2.8 in. Calculate its radius. 4a. The circumference of a circle is 7.9 cm. Calculate its radius. 4b. The radius of a circle is 8.4 in. Calculate its circumference. 5a. The circumference of a circle is 5.1 mm. Calculate its diameter. 5b. The ...
[DOC File]Example 1:
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Area of a Circle. r = radius of the circle. π = the number that is approximated by 3.141593. Heron’s Formula . a = one side of the triangle. b = another side of the triangle. c = the third side of the triangle. s = ½ (a + b + c) radius. Circumference (Perimeter) of a Circle. r = radius of the circle. π = the number that is approximated by ...
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