Chapter 7 Vocab Flashcards
Compares three or more numbers
Extended ratio
An equation that states that two ratios are equal
Proportion
The first and last numbers in a proportion
Extremes
The middle two members
Means
In a proportion, the product of the extreme equals the product of the means
Cross products property
Have the same shape but not necessarily the same size
Similar figures
If the corresponding angles are congruent and if the lengths of corresponding sides are proportional then the polygons are
Similar polygons
When three or more ratios are equal
Extended proportion
The ratio of corresponding linear measurements of two similar figures
Scale factor
All lengths are proportional to their corresponding actual lengths in a
Scale drawing
The ratio that compares each length in the scale drawing to the actual length
Scale
To find lengths that are difficult to measure directly you use
Indirect measurement
A type of mean or average which indicates the central tendency or typical value of a set of numbers
Geometric mean
A comparison of two quantities by division
Ratio
