honors geometry section 8.1 ratio and proportion
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Honors Geometry
Section 8.1Ratio and Proportion
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VocabA comparison of two numbers/quantities using division.
Ratios are written three ways: a to b, or a:b a
b
1000 16,00020
7 ft21 3 ft
7
63
1
9
Example of a Ratio: The “Ratio” of the width to length of the rectangle is 2 to 5
2 in
5 in2
5
2:5
Note: Convert thelarger unit.
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VocabAn equation that equates two ratios
a c
b d 1 10
2 20
in in
in in
In the proportion , a and d are the extremes a c
b d
In the proportion , b and c are the means a c
b d
ad bc
b
ad
c
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Honors Geometry
Section 8.1Ratio and Proportion
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Vocab
Example of a Ratio: The “Ratio” of the height to width of the rectangle is 2 to 5
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Vocab
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