Similarity and Scale Factor

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

• Congruent
• Vertical
• Similar
• Complementary 

_________ ________ is the number you multiply by the sides to create a similar figure.

• Scale Factor
• Corresponding Angle
• Pi
• Mid Point

If the scale factor is greater than one, the new figure will be

• a reduction
• an enlargement
• a scale
• not proportional

If the scale factor is less than one, the new figure will be

• an enlargement
• a reduction
• a scale factor
• bigger

Scale Factor of ½ is __________________ .

• Reduction

• Enlargement

Scale Factor of 5 is _________________ .

• Reduction
• Enlargement

What is the formula for scale factor?

• $\frac{new}{old}$ or new:old

• $\frac{old}{new}$ or old:new

What is the scale factor from the large triangle to the small triangle?

• 4/3

• 2/3

• 3/4

• 2

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

• 1/2
• 7/3
• 2
• 10/3

What is the scale factor from shape A to shape B?

• 1:1

• 2:1

• 3:1

• 1:2