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luas 2 .... 5 x 7 = 35 cm2
luas 3 ..... (1/2) x 10 x 4 = 20 cm2
jadi luas total .... 14 + 35 + 20 = 69cm2
kalo benar ... jadikan jawaban terbaik y ..
=1/2×(2+3+5)×4
=1/2×10×4
=5×4
=20 cm²
L = p × l
=7×5
=35 cm²
L=p×l
=7×2
=14 cm²
L seluruh nya =20+35+14
=69 cm²
maaf klo salah