Proportional Sides

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? Hint: the figures are similar triangles.

• 8 feet

• 72 feet

• 36 feet

• 144 feet

Find the height of the tree.

• 8 ft

• 12 ft

• 13 ft

• 15 ft

Complete each proportion.
AB / BM  =  ? / CD

• BC

• AC

• MD

• MC

• Proportional

• Not Proportional

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

• equal

• congruent

• proportional

• none of these

Solve the proportion.

• p=31.3

• p=308

• p=924

• p=532

What side corresponds with BC?

• FD

• ED

• EC

• CB

One property of similar triangles is that corresponding angles of two similar triangles are congruent. What is the second property of similar triangles?

• Corresponding sides are congruent

• Corresponding sides are unrelated

• Corresponding sides are equal

• Corresponding sides are equally proportional

What is the length of the missing side?

• 100

• 95

• 115

• 105

Find missing side

• 5

• 7

• 9

• 11