Proportions Similar Polygons

Solve for X.

• 2 ft

• 3 ft

• 4 ft

• 6 ft

Solve for x.

• 3
  -----
  10

• 10
  -----
  3

• 44x+24
  -----------
  (2x+4)(4)

• 30
  ------
  3.1

Solve for x

• 1/2

• 25/8

• 11

• 53/4

Are the two figures similar

• yes

• no

Sides in similar figures must be proportional.  

• True

• False 

When figures are similar, their corresponding angles are__________________.

• congruent

• proportional

• yellow

• obtuse

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

Find the scale factor of ΔMNP to ΔDEF

Two polygons are similar. The perimeter of the first polygon is 72 inches. The perimeter of the second polygon is 90 inches. What is the scale factor of the first polygon to the second polygon?

• 72 : 90

• 90 : 72

• 4 : 5

• 5 : 4

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.