rumus keliling limgkaran = π x d² x 1/4
=22/7 x 84 cm x 84 cm x 1/4
= 5.544 cm²
lalu 5.544 cm² / 2
= 2.772 cm²
maaf kalo kurang jelas penjelasannya sekian trims
L=1/2×π×r×r
= 1/2 × 22/7 × 42×42
= 22×6×21
= 2.772 cm persegi (B)
Sekian dan terimakasih
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rumus keliling limgkaran = π x d² x 1/4
=22/7 x 84 cm x 84 cm x 1/4
= 5.544 cm²
lalu 5.544 cm² / 2
= 2.772 cm²
maaf kalo kurang jelas penjelasannya sekian trims
L=1/2×π×r×r
= 1/2 × 22/7 × 42×42
= 22×6×21
= 2.772 cm persegi (B)
Sekian dan terimakasih