Similar Shape

Which side length corresponds with EF?

• ML

• LM

• OL

• EH

The rectangles are similar.

Solve for x.

Mathematical Equivalence

ON

Are the two figures similar?

• yes

• no

What is a scale factor?

• Shapes that have the same shape, but not necessarily the same size.

• A ratio/number that compares the sizes of the parts of the scale drawings.

• They are sides that are in the same position in different plane figures.  

• The length of a side of a similar figure.

Tell whether the two figures are similar. Explain your reasoning.

• Yes, similar because they are the same shape and side lengths are proportional.

• No, not similar because they are the same shape, but side lengths are not proportional.

• Yes, same shape

• No, different sizes

Triangle ABC and XYZ are similar.  Use your knowledge of scale factor to find the length of X.

• 20

• 25

• 100

• 40

What is the scale factor of these similar shapes?

• 10

• 7

• 9

• 11

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

• x = 9

• x = 28

• x = 7

• x = 63

Triangle ABC and XYZ are similar, ABC is the copy and XYZ is the original shape.  What is the scale factor or multiplier used to make the the smaller one larger?

• 2

• ½

• ⅖

• 5/2

Find missing side

• 5

• 7

• 9

• 11