Solve it using Pythagoras theorem
plzz help I will mark u brainliest

Reasoning:

(7^2)-(3^2)= (6.32^2)

(6.32^2)+(6^2)=(8.72^2)

I hope this helps and good luck

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

not sure but it may be b, as i said i'm not sure.