Similar Triangles Warm Up

Find the measure of the third angle of this triangle

• 40°

• 90°

• 50°

• 100°

Lance the alien is 5 feet tall. His shadow is 8 feet long. At the same time of day, a tree’s shadow is 32 feet long. What is the height of the tree?

• 20 feet

• 24 feet

• 29 feet

• 51 feet

• 15
• 13
• 11
• 17

Find the missing side

• 24

• 36

• 12

• 15

State if the triangles in each pair are similar. If so, state how you know they are similar.

• Yes, AA Similarity

• Yes, SSS Similarity

• Yes, SAS Similarity

• Not Similar

State if the pair triangles are similar. If they are similar, state how you know the triangles are similar.

• Not Similar

• Similar by SSS and by SAS

• Similar by AA

• Similar by SAS

The two triangles are similar. Find the distance d across the river?

• 81m

• 18m

• 16m

• 25m

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

The triangles are similar, solve for the question mark.

• 8

• 12.5

• 18

• 24

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