Informal Proof of AA Similarity

Informal Proof of AA Similarity

Informal Proof

• Question: Are the triangles similar?

• Present an informal argument.

Informal Proof

• Yes, ABC is similar to A'B'C'.

• They are similar because they have two pairs of corresponding angles that are equal.

• You can use the Triangle Sum Theorem to find angle A and B'. (They are 45^o)

• Since the measures of corresponding angles are equal the triangles are similar.

Informal Proof

• Question: Are the triangles similar?

• Present an informal argument.