# Sphere from tree points

Equation of sphere with three point (a,0,0), (0, a,0), (0,0, a) and center lies on plane x+y+z=a

**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

**Showing 2 comments:**

**Dr Math**

We found some bugs in this problem, but I think now is OK solution:

(x+a)^2 + (y+a)^2+(z-3a)^2 = 6 a^2

(x+a)^2 + (y+a)^2+(z-3a)^2 = 6 a^2

#### To solve this example are needed these knowledge from mathematics:

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