Question 164522
As the hypotenuse is the longest side of a right triangle, so
the hypotenuse c = 5.
The length of one of its leg is a = 3
So the length of the other leg is 
b = {{{sqrt(5^2-3^2)=4}}}
Thus the area = {{{(1/2)ab =(1/2)*3*4=6 m^2}}}