Vocabulary

Corresponding objects: Those that appear in the same place in two similar situations.

Similar: Figures that have the same shape, but not necessarily the same size.

Congruent: Figures that have the same shape and same size.

Scale Factor: A scale factor is the ratio of the lengths of two corresponding sides of two similar polygons.

Concept

Identify the basic vocabulary distinguishing between direct and indirect measurement. 

Rule

Indirect measurement allows you to use properties of similar polygons to find distances or lengths that are difficult to measure directly.

AA similarity rule states that If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.

Select the correct option that answers the given statement related to direct and indirect measurements.

Example

Select the correct answer choice.

This type of measurement allows you to use properties of similar polygons to find distances or lengths that are difficult to measure. 

Solution

By definition, indirect measurement allows you to use properties of similar polygons to find distances or lengths that are difficult to measure directly. For Example: height of a roller coaster, diameter of the moon, a single bacteria. 

Pre-requisite Skills

Properties of Similar Polygons (8.8.4)

Similarity and Transformations (8.8.3)

Congruence (8.8.2)

Congruence and Transformations (8.8.1)