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[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 …
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[DOC File]Lesson #1: Area of Circles
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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. (2) Area = 3.14 x 16 Multiply the numbers within the parentheses.
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[DOC File]Summary of Lesson Lab: CIRCLES
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calculator. 3) Calculate area of a circle and volume of a cylinder. 4) Apply equation and area of a circle and volume of a cylinder in . problem solving situations. 5) Use and modify calculator programs for circles and cylinders. Materials: TI-83 graphing calculators, overhead viewing screen, and links.
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[DOCX File]Activity 5.1 Calculating Properties of Shapes
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Calculator use is encouraged, but you must show all of your work. Use the sketch below to calculate the area of the square. Add all linear dimensions to the sketch that were used in the calculations. Note: each grid unit = 1 inch. ... What size circle would you cut out of the square in order to have a remaining area of 66.5 in2? Justify your ...
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[DOC File]Area, Perimeter and Circumference Review WS
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23. What is the area of this compound figure? 24. Find the area of the shaded region. 25. Find the area of the shaded region. 26. Susan makes a rectangular rug that has an area of 300 square inches and a width of 15 inches. What is the length of the rug? 27. What is the total length of weather stripping needed for 12 windows that each measure ...
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[DOC File]Lesson Title: Math – Use proportions to compare circle ...
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Outline of the activity: Students will measure length of a circle’s diameter for 3 different size hula hoops or other circular objects. Record data. Calculate each circle’s circumference. Calculate area of each circle. Determine the relationship between radius and area. Student materials: data sheet, string, calculator
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Area of a circle calculator