hitunglah keliling lingkaran jika jari jarinya a.10cm,b.15cm,c.1,75cm. tolong cepet jawab please

Please, let me answer your question :)
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Mapel : Matematika
Tentang : Bangun Datar
Pembahasan :

•A

r = 10 cm

K = 2πr
K = 2 x 3,14 x 10
K = 6,28 x 10
K = 62,8 cm

•B

r = 15 cm

K = 2πr
K = 2 x 3,14 x 15
K = 6,28 x 15
K = 94,2 cm

•C

r = 1,75 cm

K = 2πr
K = 2 x 22/7 x 1,75
K = 44 x 0,25
K = 11 cm

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