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Luas layang-layang kecil = 16 x 8 : 2 = 64
Luas arsir = 160-64 = 96
4. a) 180-60 = 120
b) 60
c) akar 2 kuadrat + 4 kuadrat = akar 20
d) luas = (6+8) x 4 : 2 = 28
5. Tinggi = akar 30 kuadrat - 20 kuadrat = 10 akar 5
Luas = 20 x 10 akar 5 : 2 = 223,6