Răspunsuri

2014-08-27T22:54:51+03:00
 ap = 6cm 
 ap=l√3/2
 ap=6

l√3/2=6

l=2*6/√3

l=12/√3   

l=12√3/3

l=4√3

A=l²√3/4=  (4√3)² ·√3/4=  48√3/4=  12√3

R= 4√3·4√3·4√3/12√3

=4√3 *4√3/3

=16*3/3

=16 
2014-08-28T05:42:10+03:00
Intr-un triunghi echilateral avem:
Apotema  = Raza / 2
=> Raza cercului circumscris = 2 × apotema = 2 × 6 = 12 cm