MATH SUBJ. is an acronym for five different subjects in mathematics: ALG (3 letters), TRIG (4 letters), GEOM (4 letters), ARITH (5 letters), and CALC (4 letters). Algebra is a branch of mathematics that uses symbols and equations to solve problems. Trigonometry is the study of angles and triangles, and how they relate to each other. Geometry is the study of shapes, sizes, and angles. Arithmetic is the basic form of mathematics that involves addition, subtraction, multiplication, and division. Calculus is a branch of mathematics that deals with derivatives and integrals.