Bulan penuh berkah, JANGAN NGASAL, WAJIB DIJAWAB SEMUA
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Jawab:11. Jari jari = 5 cm = atinggi = 12 cm = bsisi miring = ? = cC² = a² + b² C² = 5² + 12² C² = 25 + 144 C² = 169 C = √169 C = 13 cmRumus Selimut Kerucut = [tex]\pi[/tex][tex]r[/tex][tex]s[/tex] = 3,14 x 5 x 13 = 15,7 x 13 = 204,1 ( A )12. = [tex]\pi[/tex]r(r + 2t) = [tex]\frac{22}{7}[/tex] x 28 x ( 28 + 2 x ( 5 dm x 10 )) = 22 x 4 x ( 30 x 50 ) = 22 x 4 x 1500 = 88 x 1500 = 132.000 ( ga ada jawaban ) :emotemarah:13. Terompet = kerucut tanpa alas / selimut kerucut.s = 30cmr = 7 cm Luas Selimut Kerucut= [tex]\pi[/tex] × r × s= [tex]\frac{22}{7}[/tex] × 7 × 30= 660cm²14. 4.725 = 1/3 x luas alas x 274.725 = luas alas x 9Luas alas = [tex]\frac{4725}{9}[/tex]luas alas = 525 cm²18. Jari jari = [tex]\pi[/tex] X 2 X KJari Jari = 3.14 X 2 X 66Jari Jari = 6,28 X 66Jari Jari = [tex]\frac{66}{6,28}[/tex]Jari Jari = 10,5Volume kerucut = [tex]\frac{1}{3}[/tex] X [tex]\pi[/tex] X r² X t = [tex]\frac{1}{3}[/tex] X 3,14 X (10,5 X 10,5) X 30cm = ([tex]\frac{1}{3}[/tex] X 3,14) X (110,25 x 30) = [tex]\frac{ 3,14 x 3.307,5}{3}[/tex] = 3.465 (a)19. = [tex]\pi[/tex][tex]r^{2}[/tex][tex]t[/tex] = 3,14 x 20 x 45 = 62,8 x 45 = 2826 ( ga ada jawaban ) ( kalo paling terdekat adalah B )20. 40 + 20 + 35 + 50 + 15 =[tex]\frac{160}{5}[/tex] = 32 kg (C)Penjelasan:Semoga Membantu :3Maaf Kalau Salah#NOCOPAS