need to find the area of all of these shapes:
triangle with hight of 11 and base of 11
parallelagram with base of 15 and height of 9
triangle with base of 19 and hight of 6
triangle with base of 10 and hight of 13
triangle with base of 5 and hight of 18
triangle with hight of 8 and base of 18
parallellagram with base of 16 and hight of 4