Dilations, Scale Factor, and Similar Polygons

A dilation produces a similar figure

• True
• False

In a dilation what mathematical operation is used with the scale factor?

• addition 
• subtraction 
• multiplication 
• division 

If two polygons are SIMILAR, then the corresponding sides must be _____.

• Congruent

• Proportional

• Parallel

• similar

If two polygons are SIMILAR, then the corresponding angles must be _____.

• Complementary

• Supplementary

• Congruent

• Linear pairs

What is the scale factor from the small shape to the big shape?

• 1/2
• 7/3
• 2
• 10/3

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

• ½
• ¼
• 4
• 2

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

How do you write the algebraic notation when the scale factor is 1/2?

• (x, y) −> (2x, 2y)

• (x, y) −> (1/2x, 1/2y)

• (x, y) −> (-2x, -2y)

• (x, y) −> (2x, 1/2y)

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

• x = 12
• x = 3
• x = 40
• x = 4

A triangle has sizes measuring 11 cm, 16 cm, and 16 cm. A similar triangle has sides measuring x cm, 24 cm, and 24 cm. What is x?

• x = 19 cm
• x = 24 cm
• x = 3 cm
• x = 16.5 cm