Question

Aria triunghiului echilateral cand o latura este de 12 rad 3 ?

Answer 1

A= l^2r3/4
A= (12r3)^2* r3/4
A= 432r3/4
A= 108r3 cm^2 
^2= la puterea a doua/ la patrat 

Answer 2

ΔABC- echilateral ║ Formula ariei  → $\boxed{A= \frac{l^2 \sqrt{3} }{4} }$
l=12√3 cm               ║
_______________║ 
A=?                           ║   

Rezolvare: $A=\frac{l^2 \sqrt{3} }{4} {\to } \frac{(12 \sqrt{3})^2 \sqrt{3} }{4} = \frac{(\not{144}*3) \sqrt{3} }{\not4} =(36*3) \sqrt{3} =108 \sqrt{3} cm (Aria)$

Mult noroc!