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Verified answer
A ) Keliling = 2 × π × r= 2 × 22/7 × 49
= 308 m
b ) 2 × 22/7 × 21
= 132 m
c ) 2 × 3,14 × 5
= 31,4 cm
d ) 2 × 3,14 × 12
= 75,36 cm
e ) 2 × 22/7 × 10,5
= 66 cm
f ) Keliling = π × d
= 22/7 × 70
= 220 cm
yang b)
c)
e)
f)
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