You need only one to completely describe its dimensions, although you can make lots of measurements.
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Sphere is one syllable: sphere.
There is no edge in a SPHERE
A sphere has 0 edge.
Your measurements are not those of a sphere. The 12 inches and 6 inches are OK, but if it's a sphere, its height would equal the diameter and be equal to 12 inches. Please repost your question and change either the height or the word, "Sphere".
one, if its a perfect sphere the radius will be constant whereever you measure it