Triangles
9 topics available
topics
Triangle angle sum and exterior angle theorem
Triangle inequality theorem
Classification by sides and angles
Pythagorean theorem
Task-setsSlides
Special right triangles: 30-60-90 and 45-45-90
Triangle congruence criteria (SSS, SAS, ASA, AAS)
Triangle similarity criteria (AA, SAS, SSS) and proportional sides
Task-setsSlides
Properties of isosceles triangles
Area and perimeter of triangles
Task-setsSlides