Similar Figures and Scale Factors

Front

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

Back

Similar

Front

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

Back

an enlargement

Front

Scale is 1cm = 8km. Hatboro and Smithville are 24cm apart on the map, what is the actual distance between the 2 cities?

Back

192 km

Front

All angles in similar figures are congruent. True or False?

Back

True

Front

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

Back

No, not similar because they are the same shape, but side lengths are not proportional.

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity.

Front

What does it mean for two figures to be congruent?

Back

Two figures are congruent if they are the same shape and size.

Front

What is the relationship between the side lengths of similar figures?

Back

The side lengths of similar figures are proportional.

Front

If a figure is reduced by a scale factor of 1/2, what happens to its size?

Back

The figure is reduced to half its original size.

Front

What is the scale factor if a triangle with sides 3 cm, 4 cm, and 5 cm is enlarged to 6 cm, 8 cm, and 10 cm?

Back

The scale factor is 2.