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Omni-MATH / Each of the numbers 1,2,…,9 is to be written into one of these circles, so that each circle contains exactly one of these numbers and (i) the sums of the four numbers on each side …

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problem

Each of the numbers 1,2,…,91,2, \ldots, 9 is to be written into one of these circles, so that each circle contains exactly one of these numbers and (i) the sums of the four numbers on each side of the triangle are equal; (ii) the sums of squares of the four numbers on each side of the triangle are equal. Find all ways in which this can be done.
Plain-text mathematical notation (without MathML)
Each of the numbers 1,2,…,9 is to be written into one of these circles, so that each circle contains exactly one of these numbers and (i) the sums of the four numbers on each side of the triangle are equal; (ii) the sums of squares of the four numbers on each side of the triangle are equal. Find all ways in which this can be done.
Original LaTeX notation
Each of the numbers $1,2, \ldots, 9$ is to be written into one of these circles, so that each circle contains exactly one of these numbers and (i) the sums of the four numbers on each side of the triangle are equal; (ii) the sums of squares of the four numbers on each side of the triangle are equal. Find all ways in which this can be done.

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