New page: 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 adjac...
[[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''.