8 9-formulasanddistance

8
Formulas in Geometry Lessons 8 and 9

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Transcript of 8 9-formulasanddistance

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Formulas in GeometryLessons 8 and 9

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DefinitionsA formula is a mathematical relationship expressed with symbols. Some formulas have already been encountered in algebra.

The perimeter is the sum of the side lengths of a closed geometric figure. It is often thought of as the formulas used in other distance around a figure.

The formula for the perimeter (P) of a rectangle, with length ℓ and width w is: P = 2l + 2w

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Common Area Formulas

Rectangle A = bh

Parallelogram A = bh

Triangle A = 1/2bh

Trapezoid A = 1/2h(b1 + b2)

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Pythagorean Theorem

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Temperature Formulas

Formula to convert a temperature in Fahrenheit (F) to Celsius (C)

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Distance Formulas

How is the distance formula related to the Pythagorean Theorem?

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The formula for the Distance between the points (x1, y1) and (x2, y2) is:

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Lesson Practice Problems

Lesson 8: p. 50 a - h

Lesson 9: p. 55 a - d


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