Luas ³/₄ Lingkaran = ³/₄ πr²
Luas ³/₄ Lingkaran = ³/₄ x 22/7 x 21 x 21
Luas ³/₄ Lingkaran = ³/₂ x 11 x 3 x 21
Luas ³/₄ Lingkaran = 1039,5 cm²
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Verified answer
Luas ³/₄ Lingkaran = ³/₄ πr²
Luas ³/₄ Lingkaran = ³/₄ x 22/7 x 21 x 21
Luas ³/₄ Lingkaran = ³/₂ x 11 x 3 x 21
Luas ³/₄ Lingkaran = 1039,5 cm²