Ratio and Similar Triangles

Find side length X.

• 22.5

• 10

• 9

• 7.5

• 20
• 30
• 25
• 23

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

Which is NOT true about similar triangles.

• The angles in the triangles are congruent to each other.

• The sides are proportional to each other.

• The angles in each triangle add up to 180^o.

• The triangles must have at least one side that is the same length.

What does it mean for two shapes to be similar?

• Same shape, but different size.

• Same size and same shape.

• Their angles add up to 180^o.

• They are congruent.

Find side length X.

• 30

• 25

• 15

• 40

Look at the picture. Find the value of x.

• 14 ft

• 28 ft

• 10 ft

• 18 ft

Find the missing length.

• 9

• 18

• 4.5

• 16

A 8 ft tall tent standing next to a lawn ornament casts a 4 ft shadow. If the lawn ornament is 6 ft tall, then how long is its shadow?

• 3 ft 

• 16 ft

• 12 ft 

• 2 ft 

Find the length of x

• x = 1

• x = 2

• x = 7

• x = 1/7