8 1 ratios and proportions
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8-1 Ratios and Proportions. Four Key Terms Two Properties. Proportion. A statement that two ratios are equal. . Key Terms. and. Extended proportion. Written form of three or more ratios are equal. . Key Terms. Properties of Proportions. Cross-Product Property. (1). (2). (3). (4).

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8-1 Ratios and Proportions

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8 1 ratios and proportions

8-1Ratios and Proportions

Four Key Terms

Two Properties


Key terms

Proportion

A statement that two ratios are equal.

Key Terms

and


Key terms1

Extended proportion

Written form of three or more ratios are equal.

Key Terms


Properties of proportions

Properties of Proportions

Cross-Product Property

(1)

(2)

(3)

(4)


Key terms2

Scale drawing

Scale

A drawing in which all lengths are proportional to corresponding lengths.

A comparison of each length in a drawing to the actual length.

Key Terms


1 answer the following

#1 Answer the following

A photo that is 8 in. wide and 10 in. high is enlarged to a poster that is 2 ft. wide and 2.5 ft. high. What is the ratio of the height of the photo to the height of the poster?


2 write two equivalent proportions

#2 Write two equivalent proportions

(1)

(2)

(3)

(4)


3a solve each proportion

#3a Solve each proportion

Cross-Product Property


3b solve each proportion

#3b Solve each proportion

Cross-Product Property


4 find the dimensions of the scale drawing

#4 Find the dimensions of the scale drawing

  • You want to make a new scale drawing with a scale of 1 in. = 4 ft. What would be the dimensions of your 14 ft.-by-10 ft. bedroom in this scale drawing?


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