For each challenge, click on the dots to drag and move the corners of triangle DEF.[br][br]Try to find a triangle with the same listed measurements that is [b]not [/b]congruent to triangle ABC.[br][br]If you're not sure whether your triangle is congruent or not, click the check box in the bottom to show ALL the triangle measures and confirm.
Which rules actually prove that the triangles must be congruent ?