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Index Entry
We have learned elsewhere that the sum of the second powers of the two edges of a right triangle equals the second power of the right triangle’s hypotenuse; and since the hypotenuse of the two similar equiedged right triangles formed on the face of the cube by the sphere-center-connecting diagonal has a value of two, its second power is four; half of that four is the second power of each of the equiledges of the right triangle of the cube’s diagonaled face; half of four is two.
