Similar Shapes and Scale Models

The triangles are similar, solve for the question mark.

• 8

• 12.5

• 18

• 24

Similar Figures are...

• figures that are the same size and the same shape.

• Figures that have corresponding angles that are congruent and corresponding sides that are congruent

• figures that have the same shape but not necessarily the same size.

• Figures that are the same size but different shapes.

Complete each proportion.
CB / DM  =  AC / ?

• BM

• MA

• BC

• AD

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

• Congruent

• Vertical

• Similar

• Complementary 

Sides in similar figures must be proportional.  

• True

• False 

In similar Polygons, corresponding sides are ___ and corresponding angles are ___. (Fill in the blanks)

• congruent, proportional 

• proportional, congruent 

• congruent, congruent

• proportional, proportional

From Denver to Chicago = 3 inches. If the scale is 1 inch = 300 miles, find the actual distance.

• 300 miles

• 1000 miles

• 900 miles

• 600 miles

What is the scale factor if the triangle on the left is the original?

• 2

• 3/2

• 2/3

• 1/2

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

• 0.25
• 0.5
• 2
• 1/2