SSS- If all three pairs of sides of two triangles are proportional, then the two triangles are similar.
SAS- If two triangles have two pairs of proportional sides and the angles between those sides are congruent, then the two triangles are similar.
AA (notice, only two “A”‘s!)- If two triangles have two pairs of congruent angles, then the two triangles are similar.
Notice the different wording compared to that of congruence structures. Sides are proportional, but angles are still congruent.
Recall that once two triangles are similar, you know that all of their corresponding angles are congruent and their corresponding sides are proportional.
Practice in Springboard, for PBA on Wednesday/Thursday (due that day):
p. 241-245: 1-19
p. 259: 5ab, 6ab, 7a-c, 8-14
p.262: 1, 2
p. 264: ALL
p. 265: 1-4
p. 267: 6, 9, 10, 11