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Jawab:

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LINGKARAN

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RUMUS KELILING LINGKARAN

UNTUK JARI² = 2 × π × R

UNTUK DIAMETER = π × d

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A. K = π × d

K = 22/7 × 12

K = 22 × 2

K = 44 cm

B. K = 2 × π × r

K = 2 × 3,14 × 10

K = 6,28 × 10

K = 62,8 cm

C. K = π × d

K = 22/7 × 28

K = 22 × 4

K = 88 cm

D. K = π × d

K = 22/7 × 35

K = 22 × 5

K = 110 cm

Semoga membantu

a. K = πd

K = 3,14 × 12

K = 37,68 cm

b. K = 2πr

K = 2 × 3,14 × 10

K = 2 × 31,4

K = 62,8 cm