Question

The perimeter of a triangle is 27 inches. only 2 sides are known 12.3 and 5.4. What is the third side and what is the equation

Answer 1

9.3

Explanation:

perimeter of triangles is just all sides added together so all you have to do is: add 12.3+5.4=17.7 and then subract it from 27 (27-17.7=9.3)