SSS Similarity (Side-Side-Side Similarity, SSS~)
How to solve SSS similarity problems: theorem, example, and its solution.
If three corresponding sides of two triangles are proportional,
then those two triangles are similar.
Two corresponding sides of △ABC and △DEF are proportional:
AB/DE = AC/DF = 2.
And the followings are the ratios of the sides.
So find the following
that shows the missing proportionality:
BC/EF = 2.
If the followings are the congruences of angles,
then you should find the congruence of inscribed angles.
SAS similarity (Side-Angle-Side similarity)