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cara mudahnya:
L = Lpersegi kecil + 4.LΔ
a. L = Lpersegi kecil + 4.LΔ
L = 4 + 4.(2x1)/2
L = 4 + 4
L = 8 satuan luas
b. L = Lpersegi kecil + 4.LΔ
L = 1 + 4.(4x3)/2
L = 1 + 24
L = 25 satuan luas
c. L = Lpersegi kecil + 4.LΔ
L = 4 + 4.(4x2)/2
L = 4 + 16
L = 20 satuan luas
d. L = Lpersegi kecil + 4.LΔ
L = 4 + 4.(4x2)/2
L = 4 + 16
L = 20 satuan luas
e. L = Lpersegi kecil + 4.LΔ
L = 25 + 4.(7x2)/2
L = 25 + 28
L = 53 satuan luas
f. L = Lpersegi kecil + 4.LΔ
L = 9 + 4.(5x2)/2
L = 9 + 20
L = 29 satuan luas