Question

how to construct a triangle with two right angle

Answer 1

That would contradict with the fact that, sum of all angles of a triangle is 180. ... No, you can not have a triangle with 2 right angles. The sum of the internal angles of a triangle is 180 degrees. Two right angles together make 180 degrees Your third angle will be 0 degrees which is absurd.

Answer 2

We can't construct a triangle with two right angle because in triangle sum of three side is 180 degree but sum of two right angle is 180 degree we can make triangle do three 60 degree