This is another video in the Year 9 series looking at Geometry. And what a video it is! Congruent triangles seems to be something which confuses a lot of people. Well, don't be confused any more. This video looks at what congruence is and how to use the 4 congruence rules; SSS, SAS, AAS and RHS. There are lots of worked examples which are used to frame the easy to understand theory.