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O prisma dreapta are baza un triunghi echilateral de latura 12 cm si inaltimea de 10 cm.Aflati volumul prismei.

Răspuns :

V=Ab*h/3
Ab=[tex] l^{2} [/tex][tex] \sqrt{3} [/tex]/4
Ab=[tex] 12^{2} [/tex]*[tex] \sqrt{3} [/tex]/4
Ab=144*[tex] \sqrt{3} [/tex]/4
Ab=36[tex] \sqrt{3} [/tex] cm patrati
V=36[tex] \sqrt{3} [/tex]/*10/3
V=120[tex] \sqrt{3} [/tex] cm cubi
Ab=l^2√3/4=12^2√3/4
Ab=144√3/4=36√3 cm^2
V=Ab•h<=>V=36√3•10=360√3 cm^3