Similar Figures & Proportions

Working with

Similar Figures

by use of proportions

Poll

Did you understand the EdPuzzle from last night?

• Yes, it was easy to follow

• I think I kind of get the concept

• I am having trouble with this

How to set up similar figure proportions

• Make a word ratio to show the comparision

• Underline/highlight important information

• Draw a diagram if needed!

• Write your proportion

• Solve

• Label your answer

Set up a proportion to help you solve for the missing value:

There are more than one correct proportion that can be used!

Multiple Select

Which two proportions could be used for this problem?

• $\frac{x}{12}=\ \frac{22}{132}$

• $\frac{x}{22}=\frac{12}{132}$

• $\frac{x}{12}=\frac{132}{22}$

Set up a proportion to help you solve for the missing value:

There are more than one correct proportion that can be used!

Multiple Choice

Which proportion could NOT be used to solve this problem

• $\frac{35}{x}=\frac{5}{9}$

• $\frac{x}{9}=\frac{35}{5}$

• $\frac{x}{5}=\frac{35}{9}$

Set up a proportion to help you solve for the missing value:

There are even MORE proportion possibilities for this problem!

Set up a proportion to help you solve for the missing value:

There are more than one correct proportion that can be used!

Open Ended

What defining features of the image did you use to help you set up a proportion for this problem?

Draw a diagram to show this situation

Be sure to label with measurements!

Multiple Choice

How long is the shadow of the lawn ornament?

• 3 ft

• 18 ft

• 6 ft

• 9 ft

• 2 ft

Draw a diagram to show this situation

Be sure to label with measurements!

Multiple Choice

How long is the shadow?

• 3 ft

• 1 ft

• 2 ft

• 18 ft

• It cannot be determined

Draw a diagram to show this situation

Be sure to label with measurements!

Draw a diagram to show this situation

Be sure to label with measurements!