Luas lingkaran besar :
= π × r²
= π × (14 cm)²
= 22/7 × 14 cm × 14 cm
= 22 × 2 cm × 14 cm
= 616 cm²
Luas lingkaran kecil :
= π × (7 cm)²
= 22/7 × 7 cm × 7 cm
= 22 × 1 cm × 7 cm
= 154 cm²
Luas daerah yang diarsir :
= Luas lingkaran besar - Luas lingkaran kecil
= 616 cm² - 154 cm²
= 462 cm²
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Luas lingkaran besar :
= π × r²
= π × (14 cm)²
= 22/7 × 14 cm × 14 cm
= 22 × 2 cm × 14 cm
= 616 cm²
Luas lingkaran kecil :
= π × r²
= π × (7 cm)²
= 22/7 × 7 cm × 7 cm
= 22 × 1 cm × 7 cm
= 154 cm²
Luas daerah yang diarsir :
= Luas lingkaran besar - Luas lingkaran kecil
= 616 cm² - 154 cm²
= 462 cm²