Question

Un triunghi echilateral cu l=4 cm, are h=?

Answer 1

Formula inaltimii este:$\frac{l \sqrt{3} }{2}= \frac{4 \sqrt{3} }{2}(simplific.4.cu.2)=2 \sqrt{3}$

Answer 2

triungi echilateral
h=l radical √3 supra 2
l=4 

h=4√3 supra 2 
h=4:2 se taie si ramene sus 2 si jos 1
h=2√3