• Introduction to congruence - definition of 'congruent'
• Congruent Line Segments
• Congruent Angles

Congruent Triangles

• Congruent Triangles - introduction
• The acronym CPCTC
• Test for congruence - SSS (side side side)
• Test for congruence - ASA (angle side angle)
• Test for congruence - SAS (side angle side)
• Test for congruence - AAS (angle angle side)
• Test for congruence - HL (hypotenuse leg, of a right triangle)

• Test for congruence - Why AAA doesn't work
• Test for congruence - Why SSA doesn't work

• Congruence of rotated triangles
• Congruence of reflected triangles
• Congruence of triangles with a common side

Congruent Polygons

• Congruent Polygons - introduction (inc correspond parts)
• Tests for polygon congruence