Unit 5 Test (Similarity)

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if their corresponding angles are equal and their corresponding sides are proportional.

Front

If two figures are similar, how are their corresponding sides related?

Back

The corresponding sides of similar figures are proportional.

Front

What is the AA Similarity Postulate?

Back

The AA Similarity Postulate states that if two angles of one triangle are equal to two angles of another triangle, then the triangles are similar.

Front

What is the SSS Similarity Theorem?

Back

The SSS Similarity Theorem states that if the lengths of the corresponding sides of two triangles are proportional, then the triangles are similar.

Front

What is the SAS Similarity Theorem?

Back

The SAS Similarity Theorem states that if two sides of one triangle are proportional to two sides of another triangle and the included angles are equal, then the triangles are similar.

Front

What is a scale factor in dilation?

Back

A scale factor is a number that scales, or multiplies, the dimensions of a figure. It determines how much the figure is enlarged or reduced.

Front

Back

This is a reduction because the scale factor is less than 1.

Front

If a triangle is dilated by a scale factor of 2.5, what type of transformation is this?

Back

This is an enlargement because the scale factor is greater than 1.

Front

How can you determine if two triangles are similar using angle measures?

Back

If two angles of one triangle are equal to two angles of another triangle, then the triangles are similar (AA Similarity).

Front

What is the relationship between the areas of two similar figures?

Back

The ratio of the areas of two similar figures is equal to the square of the ratio of their corresponding side lengths.