Proportions and Dilations

Determine whether the triangles are similar.

• SSS~

• AA~

• SAS~

• not similar

How do these triangles appear to be similar?
(Hint: Look for non-labeled parts!)

• AA

• SAS

• SSS

• Not Similar

If two figures are similar,

then the sides are _________________.

• proportional

• congruent

• none of these

• equal

A ~ B. What is the scale factor of the dilation of A to B?

• 3

• 4

Dilations-Finding the Scale Factor

ABC ~ XYZ. What is the scale factor of the dilation of ABC to XYZ?

• 2

• 3

Set Up and Solve Proportions Solve for y. \frac{1.2}{1.5}=\frac{y}{5}

• y=4

• y=5

• y=2

• y=3

Set Up and Solve Proportions Alice earned $20 in 3 hours. At the same rate, what would Alice make in 8 hours?

• $53.33

• $7.50

• $33.66

• $48.72

Determine if Triangles are Similar

Are these triangles similar?

If so how?

• Yes, by SSS

• Yes, by AA

• Not Similar

Determine if Triangles are Similar

Are these triangles similar?

If so, how?

• Not Similar

• Yes, by AA

• Yes, by SSS

Solving for Missing Pieces

Find side length X.

• x=15

• x=21

• x=18

• x=3