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luas = 1/2 (6+4) x 4 = 20cm²
b = 6 cm
t = 4 cm
dit : keliling dan luas
jawab :
k = jumlah sisi pinggir / luar
= 3 + 4 + 5 + 6
= 18 cm
L = 1/2 (a + b) t
= 1/2 ( 4 + 6) 4
= 20 cm^2