Congruence of triangles (SSS, SAS, ASA, RHS)
Plane geometry · Mathematics
Study notes
Q: Two triangles have sides 5, 6, 7 and 5, 6, 7. Congruent? Also: sides 5, 6 with included 40° vs same - congruent? 5,6,7 and 5,6,7: SSS ✓ CONGRUENT! 5, 6, included 40° both: SAS ✓ CONGRUENT! Then CPCT: all matching angles and sides equal! Note: SSA (two sides + non-included angle) does NOT guarantee congruence!