Answer:
Pythagorean Theorom: [tex]a^2+b^2=c^2[/tex]
Triangle #1
[tex]21^2+x^2=29^2[/tex]
[tex]x^2=29^2-21^2[/tex]
[tex]x=\sqrt{841-441} =\sqrt{400}=20[/tex]
Triangle #2
[tex]1.6^2+3.0^2=x^2[/tex]
[tex]x=\sqrt{1.6^2+3.0^2}=\sqrt{11.56} =3.4[/tex]
Triangle #3
[tex]x^2+40^2=41^2[/tex]
[tex]x=\sqrt{41^2-40^2}=\sqrt{81} =9[/tex]
I hope this helps!
