Similarity and Dilations Review

Front

If two figures are similar, the corresponding sides are ______________.

Back

proportional

Front

The __________ is the ratio of a length of the new figure to the corresponding length on the original figure.

Back

scale factor

Front

Which of the following is NOT true about similar figures? A) Similar figures always have the same shape. B) Similar figures always have the same size. C) Similar figures always have corresponding angles that are equal. D) Similar figures always have corresponding sides that are proportional.

Back

B) Similar figures always have the same size.

Front

What is the scale factor if the lengths of the sides of a triangle are doubled?

Back

2

Front

If triangle ABC is similar to triangle DEF and the length of side AB is 6 and side DE is 9, what is the scale factor?

Back

1.5

Front

What is the missing side length x in triangle DEF if triangle ABC has sides 3, 4, and 5 and triangle DEF has sides 4.5, 6, and x?

Back

6

Front

If the scale factor of a dilation is 3, what happens to the area of the figure?

Back

The area is multiplied by 9 (3^2).

Front

If two similar triangles have a scale factor of 4, what is the ratio of their perimeters?

Back

4:1

Front

What is the center of dilation?

Back

The point from which the figure is enlarged or reduced.

Front

If triangle XYZ is similar to triangle PQR and the length of side XY is 5 and side PQ is 10, what is the ratio of the corresponding sides?

Back

1:2