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Verified answer
Luas trapesium= 1/2 (jumlah sisi sejajar) x t
= 1/2 (20 + (20 + 9 + 9)) x 12
= 1/2 (20 + 38) x 12
= 1/2 (58) x 12
= 29 x 12
= 348 cm²
Jawabannya A