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