tolong jawab karena besok mau dikumpulin .... cari keliling dan luasnya dgn caranya

keliling= π × d = 3,14 × 8 = 25,12 cm2
luas = π r kuadrat = 3,14 × 4 × 4 = 50,24 cm2
keliling = π × d = 3,14 × 12 = 37,68 cm2
luas = π r kuadrat= 3,14 × 6 × 6 = 113,04 cm2

a.
K = phi . d
K = 3,14 . 8 cm
K = 25,12 cm

L = phi . r"
L = 3,14 . 4 cm . 4 cm
L = 50,24 cm"

b.
K = phi . d
K = 3,14 . 12 cm
K = 37,68 cm

L = phi . r"
L = 3,14 . 6 cm . 6 cm
L = 113,04 cm"

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