The formula for the area of a triangle given the medians and its proof, is found on this University of Georgia site: http://jwilson.coe.uga.edu/emt725/Medians.Triangle/Area.Medians.Tri.html The formula is:where u,v, and w are the three medians. Substituting u=18, v=24, w=30 (all in centimeters), = 288 cm² Edwin