Sphere vertex point

[[Ky...]]

I need to know how to program a vertex point from a sphere and capture the distance from the datum A plane to that point but the vertex point is on a section of the sphere which has been cut away. Does anyone know of a good way to capture that distance? I've heard of progamming a sphere and then using farthest distances but i've never done it before and don't know where to start. Any help is appreciated.

[[Er...]]

If you measured the Sphere and point/plane that you wanted to measure it from, you select Size/Distance/Caliper distance. Select the features you want measured, and on the Sphere, select max, which should give you the distance from the furthest vertex point.