18 terms

complex fractions

A fraction with a numerator and/or denominator that is also a fraction.

congruent

Line segments that have the same length, or angles that have the same measure, or figures that have the same size and shape.

constant of proportionality

A constant ratio or unit rate of a proportion.

corresponding parts

Parts of congruent or similar figures that match.

cross product

If a/c=b/d, them ad=bc. If ad=bc, then a/c=b/d.

dimensional analysis

The process of including units of measurement when computing.

indirect measurement

Using the properties of similar triangles to find measurements that are difficult to measure directly.

nonproportional

The relationship in which two ratios are not equal.

proportion

A statement of equality of two or more ratios.

proportional

The ratios related terms are equal.

rate

A ratio of two measurements having different units.

ratio

A comparison of two numbers by division.

scale

The relationship between the measurements on a drawing or model and the measurements of the real object.

scale drawing

A drawing that is used to represent an object that is too large or too small to be drawn in actual scale.

scale factor

The ratio of a length on a scale drawing or model to the corresponding length on the real object.

scale model

A model used to represent an object that is too large or too small to be built at actual size.

similar figures

Figures that have the same shape but not necessarily the same size.

unit rate

A rate simplified so that it has a denominator of 1.