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= 2.(6.3) + 2.(6.4) + 2.(3.4)
= 2.18 + 2.24 + 2.12
= 36 + 48 + 24
Lp = 108 cm²
b.) Lp = 2pl + 2pt + 2lt
= 2.(7.2) + 2.(7.5) + 2.(2.5)
= 2.14 + 2.35 + 2.10
= 28 + 70 + 20
Lp = 118 cm²
c.) Lp = 2pl + 2pt + 2lt
= 2.(4.2) + 2.(4.3) + 2.(2.3)
= 2.8 + 2.12 + 2.6
= 16 + 24 + 12
Lp = 52 cm²
d.) Lp = 2pl + 2pt + 2lt
= 2.(8.10) + 2.(8.2) + 2.(10.2)
= 2.80 + 2.16 + 2.20
= 160 + 32 + 40
Lp = 232 cm²