Question

calculati aria triunghiului echilateral care are perimetrul egal cu 24 cm

Answer 1

 

$\displaystyle\bf\\P=24~cm\\\\L=\frac{P}{3}=\frac{24}{3}=8~cm\\\\A=\frac{L^2\sqrt{3}}{4}\\\\A=\frac{8^2\sqrt{3}}{4}\\\\A=\frac{64\sqrt{3}}{4}\\\\\boxed{\bf~A=16\sqrt{3}~cm^2}$

 

Answer 2

Răspuns:

Explicație pas cu pas:

P=3l    P=24cm    L=24:3=8cm

A=l²√3/4=64√3/4=16√3cm²