Question 556907
this shows a 3 4 5 right triangle, it is a basic  right triangle in most example books

but if you dont recognize it straight of the bat then this is how you find it
{{{a^2+b^2=c^2}}}
a=3 c=5
{{{3^2+b^2=5^2}}}
{{{9+b^2=25}}}
{{{b^2=16}}}
{{{b=4}}}
a=3 b=4 c=5   hence the 3 4 5 triangle