Posted by emily on Monday, April 4, 2011 at 9:09pm.
The area of a parallelogram MNOP is 48 sq cm. MX, which is a line segment perpendicular to diagonal PN where X is on PN, is 3 cm. How to find the length of diagonal NP?

geometry  Anonymous, Monday, April 4, 2011 at 10:42pm
just use the area of the lower triangle with the 3 as the height... NP=16