Question 1117022
You need to understand or know the definitions of those triangle types and know the Distance Formula (for finding the size of each segment).

Right Triangle or not - you might either use slopes of the three segments or use Pythagorean Theorem.


(Identify longest side; say it is c;  {{{x^2+y^2<>c^2}}} not a Right Triangle)


(Any two slopes negative reciprocals, then a right angle)