Understand Similar Figures

Rectangle ABCD and rectangle EFGD are similar figures. Which of the following proportions is true for the figures?

Triangle ABC and triangle WXY are similar figures. Which of the following proportions is true for the figures?

Match the following:

• the same shape but different sizes

• Corresponding

• in the same location

• To find the missing side length in similar figures

• proportional

• Similar figures have side lengths that are

• create a proportion and cross multiply

• Similar figures are

• congruent (equal)

• Similar figures have angles that are

Find side length X.

• 30

• 25

• 15

• 40

What is the length of GH?

• 22.5

• 10

• 9

• 7.5

A scale model of a building uses a scale in which 1 inch represents 20 feet. The height of the building is 180 feet.

What is the height of the scale model in inches?

• 90 inches

• 9 inches

• 900 inches

• 3600 inches

Are these figures similar?

• yes

• no

• i don't know

• not enough information

The pair of figures is similar. Find the missing side.

• x = 20

• x = 12

• x = 5

• x = 4

The pair of figures is similar. Find the missing side.

• x = 10

• x = 4

• x = 2

• x = 5

The pair of figures is similar. Find the missing side.

• x = 12

• x = 3

• x = 40

• x = 4