7.3: Proving Triangles Similar
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Theorem 7-1: Side-Angle-Side Similarity (SAS ∼) Theorem
If an angle of one triangle is congruent to an angle of a second triangle, and the sides that include the 2 angles are proportional, then the triangles are similar.
Theorem 7-2: Side-Side-Side Similarity (SSS ∼) Theorem
If the corresponding sides of 2 triangles are proportional, then the triangles are similar.
Indirect Measurement
Is a way of measuring things that are difficult to measure directly.
Postulate 7-1: Angle-Angle Similarity (AA∼) Postulate
If 2 angles of one triangle are congruent to 2 angles of another triangle, then the triangles are similar.