Luas sisi tegak prisma = 4 x Luas sisi segitiga = 4 x 65 = 260 cm^2
L sisi segitiga = 1/2 x 10 x tinggi
= 1/2 x 10 x 13
= 13 x 5
= 65 cm^2
tinggi segitiga = akar 144 + 25 = akar 169 = 13 cm
Luas permukaan bidang = 10 x 10 + 12 x 10 x 4 + Luas sisi tegak prisma
= 100 + 480 + 260
= 840 cm^2 (E)
Tabung tanpa tutup = Luas alas + Luas selimut
= pi r^2 + 2 pi r t
= 22/7 x 49 + 2 x 22/7 x 7 x 20
= 154 + 880
= 1.034 cm^2 (D)
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Luas sisi tegak prisma = 4 x Luas sisi segitiga = 4 x 65 = 260 cm^2
L sisi segitiga = 1/2 x 10 x tinggi
= 1/2 x 10 x 13
= 13 x 5
= 65 cm^2
tinggi segitiga = akar 144 + 25 = akar 169 = 13 cm
Luas permukaan bidang = 10 x 10 + 12 x 10 x 4 + Luas sisi tegak prisma
= 100 + 480 + 260
= 840 cm^2 (E)
Tabung tanpa tutup = Luas alas + Luas selimut
= pi r^2 + 2 pi r t
= 22/7 x 49 + 2 x 22/7 x 7 x 20
= 154 + 880
= 1.034 cm^2 (D)