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Verified answer
PembahasanLuas Bangun
= (a/360) x Luas Lingkaran
= (72/360) x πr²
= (72/360) x 3,14 x 20²
= (72/360) x 3,14 x 400
= (72/360) x 1256
= 251,2 cm²
Opsi A
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Kelas : 6
Mapel : Matematika
Kategori : Lingkaran
Jadi 360° : 72° = 5
Pada gambar adalah 1/5 bagian
Diameter lingkaran = 20cm
Jari2 lingkaran = 10cm
Luas lingkaran =
3,14 x 10cm x 10cm = 314cm^2
Jadi lias bangun pada gambar =
314 x 1/5 = 62,8 cm^2