Chapter 7 Proportions and Similarity

What is the measure of x?

• 12

• 15

• 6

• 9

Find AE

• 12.5

• 18

• 11.75

• 13

Choose the correct scale factor if NDMP is the original and N'D'M'P'

• 2

• 3

• 1/3

• 1/2

Find the value of x.

• 17.5

• 10

• 7

• 17

A statement that two ratios are equal is a _______.

• proportion

• ratio

• similar polygon

• means of a proportion

Two figures that have the same shape but not necessarily the same size are _____.

• dilation

• scale drawing

• scale factor

• similar

The multiplier used on each dimension to change one figure into a similar figure is the _____.

• similarity ratio

• scale factor

• proportion

• means of a proportion

In a proportion a:b = c:d, these are the first and last positions.

• extremes of a proportion

• means of a proportion

• scale factor

• similarity ratio

In a proportion a:b = c:d, the two middle positions are called the _____.

• extremes of the proportion

• similarity ratio

• scale factor

• means of the proportion

Given that 25a = 15b, find the ratio of a:b in simplest form.

• 3:5

• 5:3

• 150:1

• 1:150