Question

Calculati aria uni triunghi dreptunghic isoscel cu lungimea ipotenuzei de 20 cm

Answer 1

Tr.dr.isoscel =>cateta1=cateta2=x
t.Pit. =>x^2 + x^2 = 400
2x^2 = 400
x^2 = 200 =>x=10rad2
Aria=(10rad2×10rad2)/2=100 cm^2

Answer 2

A=cxc / 2 = c^2  /  2

T.Pitagora: c^2 + c^2 = ip^2

2c^2 = 400

c^2 = 200 ⇒ A=200/2=100cm^2