Question 840718
If it's a right triangle, it follows the Pythagorean theorem.
{{{A^2+B^2=C^2}}}, where {{{C}}} is the longest side.
I'll do the first, you can do the other two the same way.
{{{198^2+40^2=202^2}}}
{{{39204+1600=40804}}}
{{{40804=40804}}}
True, so these sides do form a right triangle.
Do the others the same way, if you get a False as an answer then they are not the sides of a right triangle.