36 is the perimeter of this triangle.
16+10+10=36
Isosceles triangle---Since the other two sides are already congruent, we don't have to find the 3rd side.
What I do, is I would either calculate the slanted lines by seeing it was a full square/rectangle or I would find the slanted lines.
This example is is better one to visualize, so I went with this one.
