Limas dgn alas segitiga sama sisi mempunyai rusuk alas 6 cm dan tinggi 10√3 cm.volume limas tsb adalah?
mohon bantuannya ya.yang mau bantu orang baik,deh!!
FauzanQodri
V= 1/3 x Lalas x tlimas Lalas = Lsegitiga = √(s(s-a)(s-b)(s-c)) , s = 1/2 Ksegitiga = 1/2 x 18 = 9 = √(9(9-6)(9-6)(9-6)) = √(9x3x3x3) = √81x3 = 9√3 Vlimas = Lalas x tinggi x 1/3 = 9√3 x 10√3 x 1/3 = 90 x 3 x 1/3 = 90 cm³
Lalas = Lsegitiga
= √(s(s-a)(s-b)(s-c)) , s = 1/2 Ksegitiga
= 1/2 x 18 = 9
= √(9(9-6)(9-6)(9-6))
= √(9x3x3x3)
= √81x3
= 9√3
Vlimas = Lalas x tinggi x 1/3
= 9√3 x 10√3 x 1/3
= 90 x 3 x 1/3
= 90 cm³