Matematika Uji Kompetensi 5 Bangun Ruang Sisi Lengkung Kelas 9 SMP MTs Halaman 309 No.7

= 2 πrt (t + Vt^2 + r^2)

V = V tabung + 2x V kerucut

= πr^t + 2x 1/3 πr^t

= 3/3 πr^2 t + 2/3 πr^2 t

= 5/3 πr^2 t

c. L = L1/2 bola + Ls kerucut

= 1/2 4 πr^2 + πrs

= 2πr^2 + πrVt^2 +r^2

= πr (2r + Vt^2 +r^2)

V = V1/2 bola + V kerucut