## Elementary Geometry for College Students (5th Edition)

150 $cm^{2}$
sides of the triangle = 15 cm , 20cm , 25 cm. by pythagoras Theorem $15^{2}$ +$20^{2}$ = $25^{2}$ HENCE its a Right angled Triangle area of a right angled triangle = $1\div$2 $\times$15 $\times$20 = 150 $cm^{2}$