Unit 3 Similarity

Tell whether the triangles are similar or not.

• a

• b

Find the missing side using proportions or scale factor.

• a

• b

• c

• d

Find the missing side using proportions or scale factor.

• a

• b

• c

• d

Find the value of x using proportions.

• a

• b

• c

• d

Are the triangles similar? Explain.

• Yes, because they are the same shape

• No, because they are not the same size

• Yes, because of the AA theorem

• No, need more information

Are the triangles similar? Explain.

• Yes, by the AA Theorem

• No, cannot use the AA Theorem

• Yes, the triangle angle sum is 180 degrees

• No, the triangle angle sum is not 180 degrees

Which triangles are similar to triangle A?

• B
• C
• Both
• None

Which triangles are similar to triangle A?

• B
• C
• Both
• None

∠U = ≅

• ∠F
• ∠G
• ∠E

∆ABC~∆XYZ
which is true?

• AB corresponds to XY

• AC corresponds to XY

• AB corresponds to XZ

• BC corresponds to XZ