Lesson 4.3: Congruent Triangles

In Lessons 4.1 and 4.2 you used known information to deduce further information about geometric figures. You will continue this trend here. Using limited information, you can conclude that two triangles are identical, which means any missing information in those triangles must also be equal.


In Lesson 4.3, you will

  • determine the minimum amount of information required to show triangles are congruent
  • prove triangles are congruent