The lengths of two adjacent sides of a parallelogram are 6 and 15. If the degree measure of the included angle is 60, what is the length of the shorter diagonal of the parallelogram?
determine the length of the altitude, using the known side ratios of a 30-60-90 triangle.
another right triangle is formed with legs of length " " and .
the hypotenuse of that right triangle is the short diagonal ... use Pythagoras to find its length.
next time, please be sure to include all information about a problem, especially what methods can be used to solve it.