"Michael Lehmann" wrote in message
...


(ie, in the same plane) at all contact points.
Billh

which plane though? A horizontal plane or an inclined one. If in the
horizontal plane then all points would have the same level above or below
whatever height datum is chosen. They would be at the same level or level
would they not?
mick

You are right. I even checked my dictionary and a definition of "level" is
all the points in a plane. A second definition is the one that most of use
who do woodworking or construction think of when we hear the term level.
Billh