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7.1: Ratios and
Proportions

Objective: Write and solve
proportions.

Standard: None.
What's a ratio?



What's a proportion?



Extended proportion?
Properties of Proportions:

                1)           2)


                3)           4)


To solve proportions: ___________________
Ex. 1) A scale model of a car is 4 in. long.
The actual car is 15 ft. long. What is the
ratio of the length of the model to the
length of the car?
Ex. 2) Solve each proportion.

a)




b)
Ex. 3) Solve each proportion.   White
                                 Boards!
a)




b)
Assignment:

#1 Proportions Worksheet


  Chapter 7 Vocabulary

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Geo 7.1 Proportions notes