Bantu jawab yang no 27 a-f dong

a) Lp = 6s²
= 6(8)²
= 384 cm²
V = s³
= 512cm³
b) Lp = 2(1/2 (6+3)4) + (5 x 12) + (4 x 12) + (6 x 12)
= 36 + 60 + 48 + 72
= 216cm²
V = luas alas x tinggi
=(6+3)4 / 2 x 12
= 18 x 12
= 216 cm³
c) t segitiga = √13² - 5²
= 12
Lp = (10 x 10) + (4 x 1/2 x 10 x 12)
= 100 + 240
= 340 cm²
tinggi limas = √12² - 5²
= √119
V = 1/3 x 10 x 10 x √119
= 100√119/3 cm³
d) Lp = 2(9 x 6) + 2(20x6) + 2(9x20)
= 108 + 240 + 360
= 708 cm²
V = luas alas x tinggi
= 6 x 9 x 20
= 1080cm³
e) Lp = 2(1/2(16+12)8) + ( 8 x 12) + (8 x 16) + (8 x 8) + (10 x 8)
= 224 +96 + 128 + 64 + 80
= 592 cm²
V = Luas alas x tinggi
= 1/2(16 +12)8 x 8
= 112 x 8
= 896 cm³
f) Lp = ( 8x11) + (2 (8x5 + 4x3)) + (11x5) + (11x5) + (4x11) + (3x11) + (9x11)
= 88 + 104+ 55 + 55 + 44 + 33 + 99
= 478cm²
V = Luas alas x tinggi
= (8x5 + 4x3) x 11
= 52 x 11
= 572 cm³