Question

Calculați aria unui triunghi echilateral latura de 4 cm

Answer 1

A ∆ech=l²√3/4
A ∆ech=16√3/4
=(putem simplifica pe 16 cu4)
=4√3cm ²

Answer 2

$\mathcal{A} =\dfrac{\ell^2 \sqrt3}{4} =\dfrac{4^2\sqrt3}{4} =\dfrac{4\cdot4\sqrt3}{4} =4\sqrt3 \ cm^2$