Question 1154905


If the sides of a triangle are {{{20}}},{{{40}}},and {{{80cm}}} , is it a right triangle?

to determine if it is a right triangle, use Pythagorean theorem

{{{80^2=20^2+40^2}}}  

{{{6400=400+1600}}}

{{{6400=2000}}}-> false

since {{{6400<>2000}}},  it is {{{not}}}  a right triangle