geometria

c1 = 12

p1 = 8

h = √c1^2-p1^2 = √12^2-8^2 = √80 = 4√5 cm 

h^2 = p1*p2 (Euclide)

p2 = h^2/p1 = 80/8 = 10 cm 

ipot. i = p1+p2 = 10+8 = 18 cm

c2 = √p2*i = √10*18 = 6√c1

perimetro 2p = 12+18+6√5 = 30+6√5  = 6(5+√5)

area A = 18*4√5 / 2 = 36√5

lato quadrato = √(36√5) = 6∜5