Soal Latihan Matematika Bangun Ruang 2
Tentukan volume dan luas bangun ruang di bawah ini! 1. Prisma segitiga Jawab : V = luas alas x tinggi prisma = ( ½ x a x t) x tp = ( ½ x 6 x 8) x 24 = (3 x 8) x 24 = 24 x 24 = 576 cm ³ Lp = (2 x luas alas) + (keliling alas x tinggi prisma) = (2 x 24) + ((6+8+12) x 24) = 48 + (26 x 24) = 48 + 624 = 672 cm ² 2. Tabung Jawab : V = ᴫ x r ² x t = 3,14 x 25 x 12 = 78,5 x 12 = 942 cm ³ Lp = 2 x ᴫ x r x (r + t) = 2 x 3,14 x 5 x (5 + 12) = 3,14 x 10 x 17 = 31,4 x 17 = 533,8 cm ² 3. Kerucut Jawab : V = ⅓ x luas alas x tinggi kerucut = ⅓ x ( ᴫ x r ²) x t = ⅓ x (22/7 x 49) x 24 = 22 x 7 x 8 = 1.232 cm ³ Lp = ᴫ x r x (r + s) = 22/7 x 7 x (7 + 25) = 22 x 32 = 704 cm ² 4. Limas Jawab : V = ⅓ x luas alas x tinggi limas = ⅓ x (12 x12) x 14 = 4 x 12 x 14 = 672 cm ³ Lp = (4 x luas sisi tegak) + (luas alas limas) =...
