Question

The perimmerter 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 in

Explanation:

Perimeter = add up the sides

12.3 + 5.4 + x = 27

17.7 + x = 27

x = 27-17.7

x = 9.3