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Matematika
dewiputri123
Pertanyaan
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1 Jawaban
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1. Jawaban imoet2
Luas = π r ^2
1386 = 22/7 x r^2
r^2= 7/22 x 1386
r = √441
r = 21 cm
K. = 2 π r
= 2x 22/7 x 21
= 132