AD^2=AB^2-BD^2=29^2-20^2
AD^2=441
MD^2=MB^2-BD^2=16 x 74-20^2
AD^2=784
AM^2=1225
AD^2+MD^2=441+784=1225=AM^2 ⇒ triunghiul MDA este dreptunghic in D
prin urmare MD⊥AD
aria tr. MDA
A=AD x MD/2=[√441 x √784] / 2=[√(3^2 x 7^2) x √(2^4 x 7^2) ]/ 2
A=√(2^4 x 3^2 x 7^4) / 2 =588/2
A=294