Penjelasan dengan langkah-langkah:

1) BALOK

p = 40 cm

l = 12 cm

t = 42 cm

a) Lp = 2 x (40x12 + 40x42 + 12x42)

= 2 x (480 + 1.680 + 504)

= 2 x 2.664

= 5.328 cm²

b) V = 40 x 12 x 42

= 20.160 cm³

2) PRISMA TRAPESIUM SAMA KAKI

a = 12 cm

b = 18 cm

t = 5 cm

tp = 21 cm

s = √(5² + [(18–12)/2]²)

s = √(25 + 9)

s = √34

a) Lp = (12+18)x5 + (12+18 + 2x√34)x21

= 150 + (630 + 42√34)

= (780 + 42√34) cm²

b) V = (12 + 18)/2 x 5 x 21

= 75 x 21

= 1.575 cm³

3) PRISMA ∆ SAMA KAKI

a = 16 cm

t = 6 cm

tp = 22 cm

s = √(6² + (16/2)²)

s = √100

s = 10 cm

a) Lp = 16 x 6 + (16+10+10) x 22

= 96 + 792

= 888 cm²

b) V = 16 x 6/2 x 22

= 48 x 22

= 1.056 cm³

6) LIMAS PERSEGI PANJANG

p = 36 cm

l = 20 cm

t = 24 cm

t∆1 = √(24²+(36/2)²)

= √(576+324)

= √900

= 30 cm

t∆2 = √(24²+(20/2)²)

= √(576+100)

= √676

= 26 cm

a) Lp = 36 x 20 + 36 x 26 + 20 x 30

= 720 + 936 + 600

= 2.256 cm²

b) V = 36 x 20 x 24/3

= 720 x 8

= 5.760 cm³