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108+56,57=164,57
= 12 × 9
= 108 cm²
L Setengah Lingkaran = × phi × r × r
= × 3,14 × 6 × 6
= 56,52 cm²
L Seluruhnya = L Persegi Panjang + L Setengah Lingkaran
= 108 + 56,52
= 164,52 cm²