2. Perhatikan gambar berikut!Tentukan luas daerah yang diarsirJawab​

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2. Perhatikan gambar berikut!Tentukan luas daerah yang diarsirJawab​

2. Perhatikan gambar berikut!Tentukan luas daerah yang diarsirJawab​

Materi: Bangun Datar

Jari-jari lingkaran kecil:

14/4 = 7/2 m (tidak diubah ke desimal)

LUAS:

¼ Lingkaran besar – ¼ Lingkaran kecil

= (¼ × π × r²) – (¼ × π × r²)

= (¼ × 22/7 × 14 × 14) – (¼ × 22/7 × 7/2 × 7/2)

= (¼ × 22 × 2 × 14) – (¼ × 22 × ½ × 7/2)

= (¼ × 44 × 14) – (¼ × 11 × 7/2)

= (11 × 14) – 77/8

= 154 – 9,625

= 144,375 cm²

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