Scale Factor with Geometric Figures

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

• 1/2
• 7/3
• 2
• 10/3

What does Congruent mean?

• When two things weight the same
• Same size same shape

What is the scale factor?

• 4
• .25
• 5
• 6

What is the scale factor from triangle ABC to triangle DEF?

• 1/2
• 7/3
• 2/1
• 10/3

__________________________ polygons are the same size and same shape

• Congruent

• Similar

___________________ polygons are the same shape but not the same size

• Congruent

• Similar

A scale factor greater than one will ______________ the size of the shape.

• Increase

• Decrease

A scale factor less than one will _______________ the size of the shape.

• Increase

• Decrease

The ratio of one item of measure to another

• Size

• Scale

• Multiply

• Divide

Tell whether the two figures are similar. Explain your reasoning. (Hint: are they proportional?)

• Yes, similar because they are the same shape and side lengths are proportional.
• No, not similar because they are the same shape, but side lengths are not proportional.
• Yes, same shape
• No, different sizes