Scale Drawing

Which triangle is similar to the above triangle?

• A

• B

• C

• D

Q1. What is the result of 74 + 30?

• 1) 74

• A) 100

• 2) 104

• 3) 108

Two objects that are the same shape but not the same size are _______.

• Congruent

• Vertical

• Similar

• Complementary 

Triangle ABC and XYZ are similar.  Use your knowledge of scale factor to find the length of X.

• 20

• 25

• 100

• 40

Triangle ABC and XYZ are similar, ABC is the copy and XYZ is the original shape.  What is the scale factor or multiplier used to make the the smaller one larger?

• 2

• ½

• ⅖

• 5/2

Sides in similar figures must be proportional.  

• True

• False 

Maura is building a 2 ft. tall model of the Gateway Arch in St. Louis, Missouri.  The scale is 3 in : 78.75 ft.  Estimate the height of the actual arch.

• 630

• 600

• 400

• 200

Q1. What is the result of 6 x 4?

• 1) 24

• 2) 16

• 3) 30

• 4) 50

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

Which triangle is similar to the above triangle ?

• A

• B

• C

• D