Added solution for Project Euler problem 91. #3144
Merged
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Name: Right triangles with integer coordinates
The points P (x1, y1) and Q (x2, y2) are plotted at integer co-ordinates and are joined to the origin, O(0,0), to form ΔOPQ.
There are exactly fourteen triangles containing a right angle that can be formed when each co-ordinate lies between 0 and 2 inclusive; that is,
0 ≤ x1, y1, x2, y2 ≤ 2.
Given that 0 ≤ x1, y1, x2, y2 ≤ 50, how many right triangles can be formed?
Reference: https://projecteuler.net/problem=91
Reference: #2695
Checklist:
Fixes: #{$ISSUE_NO}
.