What is the name of a triangle?

Answer 1

Any 'random' triangle is usually 'named' after the names of its angles - so that a triangle with angles A, B and C is generally referred to as "triangle ABC" - when this format is follwoed, then the sides will generally be named in lower-case letters which correspond to the angle they oppose - so that side 'a' is opposite angle A, and so on.

The only other "names" for triangles are for the type of triangle in question, if all tghe sides are the same length then it is an "equilateral" triangle, if one of the sides is a right angle (measures 90 degrees) it is a "right" triangle (or a "right-angled" triangle). If one of the angles is greater than 90 degrees it is an "obtuse" triangle, and if all the angles are less than 90 degrees it is an "acute" triangle