Tolong y bantu jawab makasih​

Jawaban:

Catatan__________________

k = (phi) x D = 2 x (phi) x r

phi = 22/7 atau 3,14

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1. 22/7 x 14 = 44 cm

2. 3,14 x 20 = 62, 8 cm

3. 22/7 x 21 = 66 cm

4. 22/7 x 28 = 88 cm

~Naura2803~

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