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= 3,14.5cm (5cm+12cm)
= 15,70cm (17cm)
= 266,6 cm2
l si ke
TT.r.(r+s)
3,14×5(5+13)
15,7×18
282,6 cm²
maaf kalau salah, aku cuma mau ngebantu !
TT itu pi ya