Determining If Two Figures Are Similar

What is the scale factor?

• .33

• 4

• 2

The number you use to make a bigger or smaller copy of a shape

• scale factor

• constant of proportionality

• ratio

• integer

These two figures are similar.

Solve for x.

• 15

• 63

• 45

• 27

These two triangles are similar.

Solve for x.

• 2

• 10

• 98

• 49

If triangles ABC and XYZ are similar.

Find the value of x.

• 2.5

• 10

• 15

• 3

If these triangles are similar.

Find the value of x.

• 3

• 5

• 0.5

• 2

Triangle JKL is similar to triangle GKH. Solve for x. (Be careful when determining the length of KJ)

• 8

• 15

• 3

• 10

Triangle ABC is similar to triangle XYZ.

Solve for y.

NOT x.

(Be careful when determining corresponding sides)

• 8

• 6

• 16

• 36

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

• x = 1

• x = 3

• x = 9

• x = 5

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

• Congruent

• Vertical

• Similar

• Complementary