Chapter 7 Proportions and Similarity

The length of the sides of two similar triangles are in the ratio of 2:3. If the area of the larger triangle is 45 cm², find the area of the smallest triangle.

• 30 cm²

• 15 cm²

• 10 cm²

• 20 cm²

Solve for x.

• 8

• 6

• 5

• -8

A method of measurement that uses formulas, similar figures, and/or proportions is called ______________.

• Dialation

• Proportion

• Indirect Measurement

• Geometric Measurement

The ratio of two corresponding linear measurements in a pair of similar figures is the _____.

• similarity ratio

• proportion

• scale factor

• means of a proportion

A comparison of two quantities by division is a _____.

• scale factor

• extremes of a proportion

• proportion

• ratio

A transformation that changes the size but not the shape of a figure is a _____.

• dialation

• reflection

• rotation

• similarity ratio

If two polygons are similar, then the corresponding side lengths are ___________.

• congruent

• similar

• equal

• proportional

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90

Solve the proportion.

• 10.8

• 7.5

Solve for x 

• x = 1/10

• x = 10

• x = 4

• x = 5