No 14 and 15 saja trims atas bantuannya saya kurang ngerti
indirakusuma
14. dipandang sebagai prisma dengan alas trapesium tinggi trapesium = √13³-(11-6)² = √169-25 = √144 = 12 cm volume = 1/2 x (6+11) x12x5 = 510 cm³
15. L ΔPQT = L ΔSRT L ΔPST = L ΔQRT
tinggi ΔPQT = √12²+(10/2²) = √144+25 = √169 = 13 cm L ΔPQT = 1/2 x 18 x 13 = 117 cm²
Tinggi ΔPST = √12²+(18/2)² = √144+81 = √225 = 15 cm L ΔPST = 1/2 x 10 x 15 = 75 cm²
Luas sisi tegak = L ΔPQT + L ΔSRT + L ΔPST + L ΔQRT = 117 + 117 + 75 + 75 = 384 cm²
tinggi trapesium = √13³-(11-6)² = √169-25 = √144 = 12 cm
volume = 1/2 x (6+11) x12x5 = 510 cm³
15. L ΔPQT = L ΔSRT
L ΔPST = L ΔQRT
tinggi ΔPQT = √12²+(10/2²) = √144+25 = √169 = 13 cm
L ΔPQT = 1/2 x 18 x 13 = 117 cm²
Tinggi ΔPST = √12²+(18/2)² = √144+81 = √225 = 15 cm
L ΔPST = 1/2 x 10 x 15 = 75 cm²
Luas sisi tegak = L ΔPQT + L ΔSRT + L ΔPST + L ΔQRT
= 117 + 117 + 75 + 75
= 384 cm²