Luas: π×r²
: 22/7×70×70
: 70:7=10
: 22×(10×70)
: 22×700
: 15.400 m²
Keliling: π×d d= r×2
: 22/7×140
: 140:7=20
: 22×20
: 440 cm
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Luas: π×r²
: 22/7×70×70
: 70:7=10
: 22×(10×70)
: 22×700
: 15.400 m²
Keliling: π×d d= r×2
: 22/7×140
: 140:7=20
: 22×20
: 440 cm
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