Chapter 8.1: Ratios and Proportions Flashcards
1
Q
Ratio
A
if a and b are two quantities that are measured in the same units, then the ratio of a and b is a/b. It can also be written as a:b.
2
Q
Proportion
A
an equation that equates two ratios.
3
Q
Means
A
in the proportion a/b = c/d, the numbers b and c are the means.
4
Q
Extremes
A
in the proportion a/b = c/d, the numbers a and d are the extremes.
5
Q
Properties of Proportions
A
Cross Product Property and Reciprocal Property
6
Q
Cross Product Property
A
the product of the extremes equals the product of the means. If a/b = c/d, then ad=bc.
7
Q
Reciprocal Property
A
if two ratios are equal, then their reciprocals are also equal. If a/b = c/d, then b/a = d/c.
