Perimeter of a Triangular Plot

A triangular plot of land has a base of 15 feet and a height of 10 feet. The owner wants to put a fence around the entire plot. If the two other sides of the triangle are each 12 feet in length, what is the total perimeter of the triangular plot?

Recall that the perimeter of a triangle is calculated by adding the lengths of all three sides:

$P = a + b + c$