Calculate the area and perimeter of a right triangle:
Calculate the area and perimeter of a right triangle with a 9" base and sides measuring 12 and 15.  Be sure to involve the units in your answer.
Solution:
A = 1/2 bh                   P = s1 + s2 + b
A = .5(9)(12)               P = 9 + 12 + 15
A = .5(108)                 P = 36 inches
A = 54 square inchesa