Triangles
Classification of Triangles
Classification Based on
Lengths of Sides
Classification Based
on Angles
Isosceles Triangle
Equilateral Triangle
Scalene Triangle
Obtuse-Angled Triangle
Acute-Angled Triangle
Right-Angled Triangle
Congruence of Triangles
SAS Congruence Rule
ASA Congruence Rule
SSS Congruence Rule
RHS Congruence Rule
Similarity of Triangles
SSS Similarity Criterion
SAS Similarity Criterion
AAA Similarity Criterion
Pythagoras Theorem
Proof of Pythagoras' Theorem
Pythagorean Triples
Properties of Triangles
Angle Sum Property of a Triangle
Exterior Angles of a Triangle
Angle-Side Relationships
Applications of Pythagoras' Theorem