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l=4 x 200 = 800cm = 8m
jadi luasnya
p x l
12 x 8 = 96m²
b. t= 3 x 200 = 600 cm=6m
a= 5x200=1000cm=10m
luas segitiga
1/2a.t
1/2.6.10
3.10
30m²
l = 4 cm × 200 = 800 cm = 8 m
L = 12 × 8 m² = 96 m²
b) a = 5 cm × 200 = 1000 cm = 10 m
t = 3 cm × 200 = 600 cm = 6 m
L Δ = 1/2 × 10 × 6 m² = 30 m²