This is how you classify triangles. By the sids and how much the angle measurse. the sids are scalene isoseles and equilateral the scalene. the scalene means that = It has no sides are the same langth. The Isosceles triangle means that = that it has 2 sids the same langth. The Equilateral triangle means it has = All the sids the same langht.The Acute angle meaning = Acute has less than (90 degrees). The right angles means = that it contains 1 right angle that is (90 degrees). The obtuse angles meaning is = the obtuse angles contains 1 abtuse angles greater than (90 degrees).