In the following figure, is a trapezium in which , cm, cm, cm, and cm. If a point is located on forming a rectangle , find the perimeter of .
First draw to be perpendicular on .
In rectangle , the length of is equal to the length of , and the length of is equal to the length of .
To find the length of , we can subtract the length of from .
To find the perimeter of , add the lengths of , , and .