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L lingkaran = 1/4 × π × d × d
= 1/4 × 22/7 × 21 × 21
= 9702/28
= 346,5 cm² (Jawaban tidak ada dipilihan)
◌⑅●♡⋆♡fatya27♡⋆♡●⑅◌
l= 22/7×10.5×10.5
l=33×10.5
l=346.5cm^2
jawaban 346.5cm^2
semoga membantu :)