Question 704815
{{{drawing(300,200,-1,5,-1,3,
triangle(0,0,4,0,0,2),rectangle(0,0,0.2,0.2),
locate(-0.2,-0.1,H),locate(4,-0.1,J),locate(-0.2,2.5,G)
)}}} All 3 angles add up to {{{180^o}}}. H measures {{{90^o}}}.
The other two angles add up to {{{180^o-90^o=90^o}}}, so H is the greatest angle.
GJ is the side opposite H. The other two sides are GH and HJ.
In a triangle, the side opposite the greatest angle is the longest side,
so GJ is the longest side.