To accomplish this, businesses transform the inputs to the production process provided by consumers (namely land, labor, equipment, managerial talent, and a willingness to take risks) into finished products and services.

Kis the midpoint of bc

Use pythagorean’s theorem and find the missing side lengths of the two smaller triangles and add them together
13^2 - 12^2 = 5
15^2 - 12^2 = 9
5+9 = 14
14 is the length of each side of the square
14^2 + 14^2 = 19.8
19.8 is the diagonal length of the inside if the square