d = 12 cm
r = ½ x 12 = 6 cm
Lp = luas ½ bola + luas lingkaran
Lp = ½ x 4 phi r2 + phi r2
Lp = 2 phi r2 + phi r2
Lp = 3 phi r2
Lp = 3 phi x 62
Lp = 3 phi x 36
Lp = 108 phi cm2
Baca Juga: Kunci Jawaban Matematika Kelas 7 Semester 2 Halaman 75-76 Ayo Kita Berlatih 6.1 Aritmatika Sosial