/sci/ - Science & Math

>>10062369
Right, that.
The side measurements can be obtained by triangle similarities.
Once we have the two components of the base, we know that the areas corresponding to the triangle are obtained by multiplying them by the height and dividing by two, but they have the same height and you have the area of the left triangle, so you obtain the area on the right by proportion and subtract the rest until only the triangle in the middle's left.