Similar Figure Ratio

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

The following shapes are similar, the smaller one is the original shape, what is the scale factor?

• 8:12

• 3:2

• 4:8

• 6:12

Two objects that are the same shape but not the same size are _______.

• Congruent

• Vertical

• Similar

• Complementary 

Are the following similar? Why or why not?

• Yes

• No, the corresponding angles are not equal.

• No, the ratios of the corresponding sides are not equal.

Sides in similar figures must be proportional.  

• True

• False 

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.

Solve for X.

• 2 ft

• 3 ft

• 4 ft

• 6 ft

Find the length of x

• x = 1

• x = 2

• x = 7

• x = 1/7

Find missing side

• 5

• 7

• 9

• 11

Which side length corresponds with EF?

• ML

• LM

• OL

• EH