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= 22/7 x 21 m = 66 m
L = 1/4 πd²
= 1/4 x 22/7 x 21 m x 21 m
= 11/2 x 3 x 21
= 346,5 m²
= 22/7x 21 m
= 66 m
Luas = π x r²
= 22/7 x 10,5 m x 10,5 m
= 346,5 m²
Sukses terus!!