Similar Triangles Vocabulary

SAS

Side Angle Side - Similarity Postulate: two corresponding sides are proportional, and their included angle is congruent

SSS

Side Side Side - Similarity Postulate: all corresponding sides are proportional

AA

Angle Angle - Similarity Postulate: two corresponding angles are congruent

similarity statement

a statement that two figures meet the definition of similar shapes. Example ΔABC~ΔFGH (triangle ABC is similar to triangle FGH)

similar shapes

all corresponding angles are congruent, and all corresponding sides are proportional

corresponding

angles or sides that match the same relative position in a figure

congruent

having the same or equal measure Notation used: ≅

cross products

multiplying the diagonals (means & extremes) of a proportion

~

notation that means "similar to"

proportional

scaling up or down by the same amount

scale factor

the number you multiply to change the size of a figure

proportion

two ratios or fractions that are equal