Scale Factors and Proportions

The video tutorial covers scale drawings, equivalent scales, and calculations involving models and polygons. It explains how to order scale drawings by size, identify equivalent scales, and calculate the actual size of a model airplane. The tutorial also discusses scaling quadrilateral side lengths and perimeters, comparing polygon areas, and determining scale factors between figures.

Which scale drawing is the smallest?

• One inch to one meter

• One inch to one centimeter

• One inch to one foot

• One inch to one yard

Which of the following is equivalent to a scale of one inch to one foot?

• 1 to 15

• 1 to 12

• 1 to 20

• 1 to 10

If a model airplane is 8 inches long at a scale of 1:72, how long is the actual airplane?

• 36 feet

• 72 feet

• 48 feet

• 60 feet

What is the perimeter of quadrilateral B if it is a scaled copy of quadrilateral A with side lengths 3, 6, 6, and 9, and the shortest side of B is 2?

• 16

• 18

• 14

• 12

Polygon A has an area of 4 units. If Polygon B is a scaled copy with a scale factor of 5, what is the area of Polygon B?

• 20 units

• 50 units

• 125 units

• 100 units

What is the scale factor from figure T to figure S if T is a scaled copy of S using a scale factor of 2?

• 2

• 1/3

• 3

• 1/2

If figure S is a scaled copy of figure R using a scale factor of 3, what is the scale factor from R to T?

• 12

• 3

• 6

• 9

How does the area of Polygon A compare to Polygon B if the scale factor is 5?

• 1/5

• 1/25

• 1/10

• 1/15

What is the scale factor from S to R if S is a scaled copy of R using a scale factor of 3?

• 1/2

• 1/3

• 1/5

• 1/4

If the side length of figure R is 1, what is the side length of figure T?

• 9

• 6

• 2

• 3