Question

which set of lengths could be the side lengths of a right triangle?
20cm, 22cm, 29cm.
10ft, 12ft, 15ft.
7km, 24km, 28km.
13in, 84in, 85in.

Answer 1

use pythagorus theorem a^2+b^2=c^2
take the two smallest lenght in a triangle, square each of them and add them. now check if the root of that answer gives you the third , the bigget side. if yes, well thats your triangle

Answer 2

I think it's the 10, 12, 15 but im not sure.

Answer 3

its actually the 13, 84 and 85 one

Answer 4

I just did it on my calculator ahha. Thank you! :)