# Making an angled plane cut on a cylinder

Question asked by Ram R. on Dec 20, 2018
Latest reply on Dec 20, 2018 by Ram R.

Hi guys,

Here is a problem I spent an hour trying to solve, and couldn't do it. Maybe you'll have an idea.

I have this cylinder/tube:

See the cut at the top? It almost looks like an angled plane, but it isn't. It's an ellipsoid or something, it was caused by taking a cut of a bigger and more complex model that I won't go into.

Long story short, I want to make a true angled plane cut on that cylinder, that's going to be as close as possible to the complex cut. (i.e. an approximation.)

I was basically thinking, take the highest point of the cut and the lowest point of the cut. Make a line between them, and a line from each of them to the flat bottom of the cylinder. Take the plane that intersects the two points and is perpendicular to the plane defined by the 3 lines.

But, I don't know how to define in solidworks "The highest point in the cut". I want the point in the circumference of the cut that's the farthest away from the base of the cylinder. How can I mark that point in Solidworks?