Hi guys, I am the worst at word problems. I don't even know how to start this. Here is the question:

two postitive number a and b are to be chosen so that the line segment connecting (a,0( and (o,b) has a length of 10. find the values of a and b so that he area of the triangle with verticies (0,0) (a,0) and (o,b) is maximum.

any help is appreciated.