The formula for the area of a parallelogram is A = bh. The area of the parallelogram in the illustration is 300 square centimeters. If its base is three times its height, how long (in cm) is the base?

Answer 1

A=bh = 300 cm^2

b=3h

3h^2 = 300

h^2 = 300/3 = 100

h = 10 cm high

b= 30 cm = base length