The triangle is an equilateral triangle, therefore, Diego didn't draw the right triangle.
A triangle simply means a polygon that has three edges and vertices. It's a shape in geometry.
In this case, I don't agree with Diego's drawing as the triangle is an equilateral triangle and this means that each side is 60° and not 45° as illustrated.
Learn more about triangles on:
https://brainly.com/question/17335144