hitunglah keliling lingkaran jika diketahui hal hal berikut.a.jari jari= 14 cm b. jari jari = 3,5 cm c. diameter =21 cm d. diameter = 20cm​

Jawaban:

a. Keliling Lingkaran = 2 π r

= 2 × 22/7 × 14

= 88 cm

b. Keliling lingkaran = 2 π r

= 2 × 3,14 × 3,5

= 21,95 = 22 cm

c. Keliling lingkaran = π d

= 22/7 × 21

=66 cm

d. Keliling lingkaran = π d

= 3,14 × 20

= 62,8 = 63 cm