Penjelasan dengan langkah-langkah:
Lingkaran berbentuk ¾ bagian
Luas.
L = ¾ × πr²
L = ¾ × 22/7 × 21 × 21
L = ¾ × 22 × 3 × 21
L = ¾ × 66 × 21
L = ¾ × 1.386
L = 4.158/4
L = 1.039,5 cm²
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Penjelasan dengan langkah-langkah:
L = ¾ πr²
Lingkaran berbentuk ¾ bagian
Luas.
L = ¾ × πr²
L = ¾ × 22/7 × 21 × 21
L = ¾ × 22 × 3 × 21
L = ¾ × 66 × 21
L = ¾ × 1.386
L = 4.158/4
L = 1.039,5 cm²