Isosceles Triangle Shape Acute Equilateral Triangle Triangle PNG What are the parts of right and isosceles triangles? The Handy Math. The Triangle Belt Bag is characterized by its triangular shape and points its practicality in its size. Zipper closing Double handle 100% Up cycled Leather Cotton lining, with internal slip pocket Product reference: A23031TB02 The Triangle Belt Bag is hand crafted upon order and will therefore be shipped within four to five weeks from the time the order is placed.