Kunci Jawaban Matematika Kelas 9 Halaman 303 Luas Permukaan Volume Bola Latihan 5.3 Nomor 1

r = 1/2 x 10 = 5 cm

Lp = 4 phi r²

Lp = 4 phi x 5²

Lp = 4 phi x 25 = 100 phi cm²

v = 4/3 phi r³

v = 4/3 phi x 5³

v = 4/3 phi x 125

v = 500 phi/3 = 166 2/3 phi

v = 166,67 phi cm³