MATH
posted by THAMI .
A LADDER IS LEANING AGAINST THE WALL. IF THE LADDER REACHES A HEIGHT OF 12M UP THE WALL AND HAS ITS FOOT 5M AWAY FROM IT ,CULCULATE THE LENGTH OF THE LADDER?

surely you are familiar with the 51213 Pythagorean triple?
The length of the ladder is √(5^2+12^2) = 13
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