Proportions and Scale Drawing and Similar Figures

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

• x = 20

• x = 12

• x = 5

• x = 4

A scale drawing of a house shows 9cm ×10cm. If 6cm=12 ft, what are the actual dimensions?

• 9ft x 10ft

• 1ft x 2ft

• 12ft x 6ft

• 18ft x 20ft

Solve for x

• 2

• 90

Solve for x

• x=6

• x =1/6

• x = 7

• x=9

A drawing that shows an object with its measurements in proportion to the actual measurements of the object.

• Congruent Figures

• Scale Drawing

• Coordinate Plane

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

The two rectangles are scale drawings. What is the measurement of x?

• 21

• 1.25

• 20

• 4

A room has an actual width of 20 feet and length of 25 feet.  How should the scale drawing look like if the scale used is 1 unit: 5 feet?

• A

• B

• C

• D

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet

• 16 feet 

• 10 feet

• 4 feet

The diagram below shows two similar figures. Which statement is true?