Similar Triangles, Ratios

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

• 45°:117°:18°

• 45°:18°:117°

• 35°:115°:20°

• 35°:120°:22°

Find side length X.

• 30

• 25

• 15

• 40

Mrs. Ashley used similar triangles to make a design.  Which statement about the triangles in the design must be true?

• They are the same size and shape.

• They are the same size but different shapes.

• They have corresponding angles that are congruent.

• They have corresponding sides that are congruent.

Are the triangles similar?

• Yes

• No

Given that Triangle ABC is similar to Triangle DEF. Find the angle B.

• 60⁰

• 42⁰

• 79⁰

• 180⁰

Given that Triangle BAC is similar to Triangle EDF. Find the angle EFD.

• 45

• 22

• 113

• 18

Sides in similar figures must be proportional.  

• True

• False 

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

• x = 1

• x = 3

• x = 9

• x = 5

If two figures are similar their angles are______.

• proportional

• congruent

• supplementary

• complementary