Prisma segiempat alasnya adalah belah ketupat dengan panjang diagonal - diagonalnya 16 cm dan 30 cm. bila luas prisma 4560 cm² maka volumenya adalah..
whongaliems = = = = = 17 cm L.alas = x x = x 16 x 30 = 240 cm² Kll.alas = 4 x s = 4 x 17 = 68 cm L.prisma = 2 x L.alas + Kll.alas x t 4560 = 2 x 240 + 68 x t 4560 = 480 + 68t 68t = 4560 - 480 68t = 4080 t = 4080 : 68 t = 60 cm volune = L.alas x t = 240 x 60 = 14400 cm³
=
=
=
= 17 cm
L.alas = x x
= x 16 x 30
= 240 cm²
Kll.alas = 4 x s
= 4 x 17
= 68 cm
L.prisma = 2 x L.alas + Kll.alas x t
4560 = 2 x 240 + 68 x t
4560 = 480 + 68t
68t = 4560 - 480
68t = 4080
t = 4080 : 68
t = 60 cm
volune = L.alas x t
= 240 x 60
= 14400 cm³