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ROSECODE 437

Equilateral triangles 3

liuguangxi · Math ·

Assume a point D inside an equilateral triangle ABC of side length t and with AD=x, BD=y, CD=z, 0<xyz, which is represented as quadruple (x,y,z,t).

If x,y,z,t are all integers and they are coprime, the quadruple (x,y,z,t) is called primitive integer solution. For example, (57,65,73,112) is such a solution. And it’s known that there are infinitely many solutions of primitive integer quadruple (x,y,z,t).

Find all such solutions for t5000.

Answer format: [number of solutions],[sum of x+y+z+t of all solutions]

Example: 3,1237 for t200
(explanation: there are total 3 solutions (57,65,73,112), (73,88,95,147), (43,147,152,185))