In triunghiul ABC avem : AB=9 , BC=12 , AC=15 .
a) Aria triunghiului ABC este ...


Răspuns :

p=(a+b+c)/2=(9+12+15)/2=36/2=18
S=√18(18-9)(18-12)(18-15)=√18×9×6×3=√(2²×3⁶)=2×3³=2×27=54
p=(a+b+c)/2=(9+12+15)/2=36/2=18
S=√18(18-9)(18-12)(18-15)=√18×9×6×3=√(2²×3⁶)=2×3³=2×27=54