Square diagonal calculator

Diagonal in geometry, a line segment connecting two non-adjacent vertices of a polygon or polyhedron. The diagonal of a polygon is a line segment connecting its two vertices that do not lie on one side.

Square — is a rectangle with equal sides. One can also give another definition of a square: a square is a rhombus in which all angles are straight. It turns out that the square has all the properties of a parallelogram, rectangle, and rhombus.

The diagonal of a square creates inside it an isosceles right triangle with legs in the form of its sides and a diagonal as a hypotenuse, from which we get the above formula.