### Irfan High School Sawfar's Forum

Dear Guest , Welcome to Irfan High School Sawfar's Forum . If this is
the 1st visit we would like to join us and register However dear

# How to prove that 2 triangles are congruent? Guest
زائر

If you were asked to prove that 2 given triangles are congruent,you should make sure that one of the following methods is satisfied:
-By returning to the given,you can prove that 2 sides in both triangles are equal,and each angle enclosed by these 2 sides in both triangles is equal to the other,we call this method "side-angle-side"or S.A.S.
-Another method is to prove that 1 side in both triangles is equal and the angles corresponding to it in both triangles are equal, we call this method "angle-side-angle"or A.S.A.
-A third method is to prove that all the corresponding sides in both triangles are equal, we call this method "side-side-side"or S.S.S.
-Special case:If the 2 triangles were right triangles,it is enough to prove that the hypotenuse(side opposite to the right angle) is equal in both triangles, plus proving 1 angle or side equal in both triangles.

عدل سابقا من قبل rabih sarieddeen في الجمعة مارس 20, 2009 2:07 am عدل 2 مرات (السبب : some mistakes during typing)

الوقت/التاريخ الآن هو الأربعاء نوفمبر 13, 2019 8:25 pm