Substitutes include shoulder shrugs for upper trapezius development and lateral raises for lateral deltoids. The upper arm consists of the deltoids, biceps, as well as the triceps. This is a compound exercise that involves the trapezius, the deltoids and the biceps. The movement is initiated by leaning forwards and loading the deltoids and triceps. The anterior deltoids are used as synergists in both variations. Quadrilaterals with reflection symmetry are kites, (concave) deltoids, rhombi, and isosceles trapezoids. Once the bar is on the anterior deltoids, the lifter proceeds to an overhead press. With a highest symmetry, its 2"n" faces are congruent kites (also called deltoids). The 60 faces are deltoids or kites. Anatomically, there are only two deltoids in the cat, the "acromiodeltoid" and the "spinodeltoid". Deltoids arise in several fields of mathematics. Its faces are deltoids or kites.