Ratios, Proportions, and Scale Factors

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

• x = 9
• x = 28
• x = 7
• x = 63

Find missing side

• 5
• 7
• 9
• 11

Are these triangles similar?

• Yes
• No

Find the perimeter of the large triangle.

• 24

• 36

• 12

• 54

Square A is a Dilation of Square B. What is the scale factor of the squares?

• 1/7
• 4/5
• 5/4
• 7

Solve for x. 

• 10
• 18
• 20
• 12

Solve for x 

• x = 1/10
• x = 10
• x = 4
• x = 5

Marvin's son is 3 ft tall. He casts a shadow of 1 foot. Marvin casts a shadow of 2.5 ft. How tall is Marvin?

• 3 ft
• 7.5 ft
• 1.2 ft.
• 0.8 ft.

Which proportion is true?

If a 5 ounce bag of M&M’s has 17 blue candies in it, how many blue candies will be in a 24 ounce bag?

• About 82

• About 81

• About 4

• About 17