Proportionality and Geometric Mean

These 2 triangles are similar. Determine the value of x.

• x = 3

• x = 9

• x = 6

• x = 4

What is the measure of x?

• 12

• 15

• 6

• 9

The two right triangles below are similar. What is x, the missing side length in triangle DEF? 

• 3.75

• 9.75

• 10

• 12

Determine the scale factor

• 1/5

• Not Similar

• 4/5

• 1/4

The triangles are similar, solve for the question mark.

• 8

• 12.5

• 18

• 24

What is the value of the missing segment?

• 15

• 20

• 6

• 16

Find side length X.

• 22.5

• 10

• 9

• 7.5

To find the height of a very tall pine tree, you place a mirror on the ground and stand where you can see the top of the pine tree. How tall is the tree?

• 144 feet

• 72 feet

• 36 feet

• 78 feet

Solve for x.

• 10

• 2

• 11

• 5

Find the value of x.

• x = 4.5

• x = 9

• x = 30

• x = 3