- 2.2: The SAS Theorem
- We have said that two triangles are congruent if all their correspond ing sides and angles are equal, However in some cases, it is possible to conclude that two triangles are congruent, with only partial information about their sides and angles.
- 2.3: The ASA and AAS Theorems
- In this section we will consider two more cases where it is possible to conclude that triangles are congruent with only partial information about their sides and angles,
- 2.5: Isosceles Triangles
- An isosceles triangle is a triangle that has two sides of equal length.
- 2.6: The SSS Theorem
- We now consider the case where the side of two triangles are known to be of the same length.
Thumbnail: Diagram of two congruent triangles. \(\triangle\ ABC \cong\ \triangle\ DEF\) (CC BY-SA; Merovingian via Wikipedia)