7.1 - 7.4 Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you determine if two polygons are similar?

Back

Two polygons are similar if their corresponding angles are equal and the lengths of their corresponding sides are in proportion.

Front

What is the similarity statement for two similar triangles?

Back

The similarity statement indicates which triangles are similar, such as Triangle A ~ Triangle B.

Front

What is the Side-Angle-Side (SAS) similarity criterion?

Back

If two sides of one triangle are proportional to two sides of another triangle and the included angles are equal, the triangles are similar.

Front

What is the Angle-Angle (AA) similarity criterion?

Back

If two angles of one triangle are equal to two angles of another triangle, the triangles are similar.

Front

What is the definition of corresponding sides in similar polygons?

Back

Corresponding sides are the sides of two polygons that are in the same relative position.

Front

How do you solve for a variable in similar polygons?

Back

Set up a proportion using the lengths of corresponding sides and solve for the variable.

Front

What is the Cross-Multiplication method?

Back

Cross-multiplication is a method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other ratio.

Front

What is the definition of scale factor in similar figures?

Back

The scale factor is the ratio of the lengths of corresponding sides of two similar figures.

Front

How can you prove that two triangles are similar using the SSS similarity criterion?

Back

If the lengths of all three sides of one triangle are proportional to the lengths of the corresponding sides of another triangle, the triangles are similar.