Coordinate proof triangle question help please!

A triangle formed with vertices at (1, 1), (6, 1), and (6, 4). Why is this a right triangle?
Be thorough in your answer!

Respuesta :

Because two points on the triangle line up on the x axis (at x=6) and two points line up on the y axis (at y=1) which would mean the two lines form a right angle with each other making a right angled triangle