How do you do special triangles 90 60 30?

Answer 1

That depends on what you want to 'do' to them.

It helps to remember these two simple facts. They will solve

most of the problems that involve a 30-60-90 triangle:

-- The side opposite the 30 is (1/2 of the hypotenuse).

-- The side opposite the 60 is (1/2 of the hypotenuse) times the sqrt(3) (or 31/2).