I can done collision and response when projected centre on sphere on polygon plane is InsidePolygon. But im confused how to do it with triangl''s edges. i can have the nearest point on the triangle to a sphere centre. my sphere is moving with a certain velocity. I need a reflection or response vector.??

Just take the vector from the edge''s position to the sphere''s position normalize it and consider it like the normal of the surface of a polygon.
The edge is like a sphere with and radius of zero, so the normal of it is just the normalized vector from it''s position to the centerof the spere.

After waiting days on reply I already figured it out. However thanx.