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=22/7 × 2 ×10,5 m
=22/7 × 21 m
=66 m
Luas lingkaran = π × r × r
=3,14 × 10,5 m × 10,5 m
=3,14 × 110,25 m
=346,185 m
= 2 x 22/7 x 10,5
= 44 x 1,5
= 66 cm
luas = π x r²
= 22/7 x 10,5 x 10,5
= 22 x 1,5 x 10,5
= 346,5 cm²