Sometimes triangles may look congruent when they are not .Also ,we are not always told the length of all sides or the sizes of all the angles .It isi mportant to know just how much information needs to be given in order to be able to say that two triangles Sometimes triangles may look congruent when they are not .Also, we are not always told the length of all sides or the sizes of all the angles .It isi mportant to know just how much information needs to be given in order to be able to say that two triangles