Grade 10 Math: Congruent triangles 

Congruency of triangles means that the triangles have the same corresponding side lengths and angle measurements. We have 4 rules to determine whether two triangles are congruent.
-Right angle, hypotenuse and side rule (RHS)
-Side, side, side rule (SSS)
-Side, angle, side rule (SAS)
-Angle, angle side rule (AAS)