81.-8.3 practice Geo.

Determine whether each pair of ratios forms a proportion

• Proportion

• Not a Proportion

Determine whether each pair of ratios forms a proportion

• Proportion

• Not a Proportion

Solve:

• 3

• 4

• -7

• 15

Solve:

• -4

• 10

• 3

• -4

State if the polygons are similar.

• a

• b

• c

• d

The polygons in each pair are similar. Find the scale factor of the smaller figure to the larger

figure.

• a

• b

• c

• d

Are the triangles similar?

• Yes
• No

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.

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