Question

When there is given two vertices of triangle how to find third vertex in coordinate?

Answer 1

since-sum of all angles of a triangle is 180 degree
so to find third vertex subtract sum of two vertex from 180

Answer 2

No, It is not possible to find the third vertex When only two vertices are given . To find the third vertex u must have information about The remaining vertices , centroid (or) The type of triangle ( Equilateral , isosceles,...) .

$\large\rm{Hope\:u \:understand\:!!}$