Three-dimensional linear equation: love, affection and friendship represent XYZ respectively. Use your experience to solve it. What is the solution?

The square of X plus the square of Y plus the square of Z equals 1, and the square represents two objects (if the word object can be used), family and you, love and you, friendship and you. Form a circle of space, you are the center of the circle, as long as you grasp the radius, you can be complete.

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