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A = Luas daerah arsiran
A = (7×7) + (11×11) + (9 ×11) - 0,5×( 7× 18 + 11×20)
A = (49 + 121 + 99) - 0,5×(126 + 220)
A = 269 - 0,5×346
A = 269 - 173
A = 96 cm²
Jawab
Luas daerah arsiran pada gambar tersebut
adalah 96 cm².
@Wello1
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