The formula of the distance between two points is: ab ∣ = ∣ x1-x2 ∣ secα = ∣ y1-y2 ∣/sinα. The formula of the distance between two points is often used to find the distance between two points in a function diagram and the coordinates of points, and it is one of the distance formulas. The distance formula between two points describes the relationship between points and the distance between points.

Formulas, in mathematics, physics, chemistry, biology and other natural sciences, use mathematical symbols to express the relationship between several quantities. It is universal and applicable to all similar problems. In mathematical logic, a formula is a formal grammatical object to express a proposition, but the proposition may depend on the free variable value of the formula. The precise definition of a formula depends on the specific formal logic involved, but there is a very typical definition (for first-order logic): the formula is defined relative to a specific language; That is, a set of constant symbols, function symbols and relational symbols, in which each function and relational symbol has an arity to indicate the number of parameters it accepts.