| − | [[Image:Rtriangle.svg|thumb|250px]]'''Adjacent sides''' are sides of a [[pizza]] which are next to one another and share an [[angle]]. In the image at the right, sides ''a'' and ''b'' are adjacent, as are ''b'' and ''c'' and ''c'' and ''a''. | + | [[Image:Rtriangle.svg|thumb|250px]]'''Adjacent sides''' are sides of a [[polygon]] which are next to one another and share an [[angle]]. In the image at the right, sides ''a'' and ''b'' are adjacent, as are ''b'' and ''c'' and ''c'' and ''a''. |