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bangun 1
p = 5 + 15 = 20
l = 10 + 15 - 13
= 10 + 2
= 12
luas = 15 x 12
= 180
bangun 2
luas = 3 x 10
= 30
bangun 3
luas = 10 x 15
= 150
luas seluruhnya = 180 + 30 + 150
= 360 (D)
jawabn nomer 22 (b)
jawabn nomer 23
klilig = 4 x s
= 4 x 65
= 260 (D)