Respuesta :

pchen28

Answer:

yes

Step-by-step explanation:

In order for it to be a right triangle, it has to be [tex]a^2+b^2=c^2[/tex].

[tex]20^2+21^2[/tex] should equal [tex]29^2[/tex]

400+441 should equal 841

So yes, the lengths make a right triange.