Finding Missing Similar Triangles

What is the missing Angle?

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Find side length X.

• 16

• 18

• 2.4

• 15

Using a proportion, find the height of the tree.

• x = 0.0625 ft.

• 1.6 feet

• x = 16 ft.

Given triangle ABC is similar to triangle DEF, label the missing angles.

c

d

e

123°

84°

53°

39°

57°

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

• x = 1

• x = 3

• x = 9

• x = 5

Which statement about the triangles at the right is true?

• ΔABC is not similar to ΔADF

• ΔABC is similar to ΔADF

• ∠BAC is not congruent to ∠DAF

• ΔABC is congruent to ΔADF

The triangles shown are similar. Similar figures are the same ​ (a)   , but ​​different ​ (b)   . This means that the sides are ​ (c)   and the angles are ​ (d)   .

(knowing this info will help with a test question)

• Shape

• sizes

• proportional

• congruent

Are Triangle ABC and Triangle XYZ similar?

• No, corresponding angles are not congruent

• No, corresponding sides are not proportional

• Yes, corresponding angles are congruent

• Yes, corresponding sides are proportional

Are these triangles similar?

• Yes

• No

Find the perimeter of the large triangle. (First find the missing side length)

• 24

• 36

• 12

• 54