There are three points a, B and C on the sphere. It is known that ab = 3, AC = 4 and BC = 5. If the distance from the center of the sphere to the plane ABC is 6, the surface area of the sphere is 0

There are three points a, B and C on the sphere. It is known that ab = 3, AC = 4 and BC = 5. If the distance from the center of the sphere to the plane ABC is 6, the surface area of the sphere is 0

Let the center of the ball be o, the center of the circular surface where ABC is located be o ', and the radius be r, then OO' = 6, and R = o'b = 5 / 2, so R ^ 2 = 6 ^ 2 + (5 / 2) ^ 2. S = 4 * pi * R ^ 2