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Jawaban:
L permukaan bola = L 1/2 bola + L lingkaran
= 2πr^2 + πr^2 = 3πr^2
a. 3πr^2 = 3π x 4^2 =3π x 16 = 46π cm^2
b. 3πr^2 = 3π x 12^2 =3π x 144 = 432π cm^2
c. 3πr^2 = 3π x 6^2 =3π x 36 = 108π cm^2
d. 3πr^2 = 3π x 8^2 =3π x 64 = 192π cm^2
e. 3πr^2 = 3π x 7,5^2 =3π x 56,25 = 168,75π m^2
f. 3πr^2 = 3π x 11^2 =3π x 121 = 363π dm^2
Baca Juga: Perbandingan Pola Penyajian Teks Biografi, Bahasa Indonesia Kelas 10 Halaman 223, 224
