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= 22/7 x 28
= 88 cm
Luas = πr²
= 22/7 x 14 x 14
= 616 cm²
r= 14
luas lingkaran = π × r²
22/7 × 14²
22 × 2 × 14
616 cm²
keliling lingkaran = 2 × π × r
2 × 22/7 × 14
2 × 22 × 2
88 cm