luas arsir
= Luas trapesium - luas 1/2 lingkaran
= 1/2 (144+216) x 120 - 1/2 x 22/7 x 42²
= 21600 - 2772
= 18828 cm²
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luas arsir
= Luas trapesium - luas 1/2 lingkaran
= 1/2 (144+216) x 120 - 1/2 x 22/7 x 42²
= 21600 - 2772
= 18828 cm²