the formula is a^2+b^2=c^2 so one leg is 21 so a+ 21^2=29^2. Then you square both and get a+441=841. Then you subtract 441 from both sides and get 400. You square 400 and get 20.
the formula is a^2+b^2=c^2 so one leg is 21 so a+ 21^2=29^2. Then you square both and get a+441=841. Then you subtract 441 from both sides and get 400. You square 400 and get 20.
