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Sufficient condition p is a sufficinet condition for q if and only if p implies q. SSS If, in two triangles, three sides of one are congruent to three sides of the other, then the triangles are congruent. SAS If, in two triangles, two sides and the included angle of one are congruent to two sides and the included angle of the other, then the triangles are congruent. ASA If, in two triangles, two angles and the included side of one are congruent to two angles and the included side of the other, then the two triangles are congruent. AAS If, in two triangles, two angles and a non-included side of one are congruent respectively to two angles the corresponding non-inlcuded side of the other, then the triangles are congruent. Congruence Theorems A figure F is congruent to a figure G if and only if G is the image of F under a reflection or a composite of reflections. included angle Of two consecutive sides of a polygon, the angle of the polygon whose vertex is the common point of the two sides. included side Of two consecutive angles of a polygon, the side of the polygon which is on both the angles. Isosceles Triangle Base Angles Converse Theorem If two angles of a triangle are congruent, then the sides opposite them are congruent. overlapping figures Figures which have interior ponts in common. nonoverlapping figures Regions that do not share interior points.