A dan b aja gausah banyak²​

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A dan b aja gausah banyak²​

A dan b aja gausah banyak²​

a.)

K = 2 × π × r

=> 2 × 22/7 × 14

=> 2 × 22 × 2

=> 88 cm

b.)

K = 2 × π × r

=> 2 × 22/7 × 3,5

=> 2 × 22/7 × 7/2

=> 22/7 × 7

=> 22 cm

Jawaban :

a. r = 14 cm

K = 2πr

= 2 × 22/7 × 14

= 2 × 22 × 2

= 44 × 2

= 88 cm

b. r = 3,5 cm

K = 2πr

= 2 × 22/7 × 3,5

= 44/7 × 3,5

= 44/7 × 3 5/10

= 44/7 × 35/10

= 44/7 × 7/2

= 308/14

= 22 cm