Question

Bantu jawab ya.. pakai cara no 4 dan 5

Answer 1

No. 4
AC² = BC² - AB²
AC² = 68² - 32²
AC = √4.624 - 1.024
AC = √3600
AC = 60

Luas ABC = Luas DEF = 1/2 (32)(60)
                   = 960 x 2 = 1.920

Luas ACFD = 60 x 10,5 = 630
Luas BCFE = 68 x 10,5 = 714
Luas ABED = 32 x 10,5 = 336

Luas Permukaan Prisma = 1.920 + 630 + 714 + 336
                                            = 3.600 cm²

No. 5
2p + 2l = K
2p + 2(24) = 112
2p + 48 = 112
2p = 112 - 48
p = 64/2
p = 32

Luas alas + atap = 2(32)(24) = 1.536
Luas 2 sisi panjang = 2(32)(45) = 2.880
Luas 2 sisi lebar = 2(24)(45) = 2.160

Luas permukaan = 1.536 + 2.880 + 2.160
                              = 6.576 cm²