ANSWER:
[tex]\mleft\{36,76,85\mright\}[/tex]STEP-BY-STEP EXPLANATION:
The right angles fulfill the Pythagorean theorem which is the following
[tex]h^2=a^2+b^2[/tex]We evaluate each option, replacing:
[tex]\begin{gathered} 25^2=7^2+24^2\rightarrow625=625\text{ correct option} \\ 85^2=36^2+76^2\rightarrow7225=7072\text{ incorrect option} \\ 10^2=6^2+8^2\rightarrow100=100\text{ correct option} \\ 35^2=28^2+21^2\rightarrow1225=1225\text{ correct option} \end{gathered}[/tex]