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JARING –JARING TABUNG

JARING –JARING TABUNG. diameter. tutup berbentuk lingkaran jari – jari Selimut berbentuk persegipanjang tinggi alas berbentuk lingkaran. LUAS PADA TABUNG. LUAS TUTUP DAN ALAS TABUNG L = r² atau L = ¼ d² Keterangan : L = Luas

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JARING –JARING TABUNG

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  1. JARING –JARING TABUNG diameter tutup berbentuk lingkaran jari – jari Selimut berbentuk persegipanjang tinggi alas berbentuk lingkaran

  2. LUAS PADA TABUNG • LUAS TUTUP DAN ALAS TABUNG L = r² atau L = ¼ d² Keterangan : L = Luas r = Jari-jari d = diameter • LUAS SELIMUT TABUNG Luas Selimut tabung = 2 rt K = 2 r t Keterangan : r = jari-jari t = tinggi K = keliling lingkaran

  3. Gabungan tutup, alas dan selimut tabung adalah LUAS PERMUKAAN TABUNG. L = 2 x L alas + L selimut = 2 x r² + 2 rt = 2 r (r + t) KETERANGAN : L = Luas permukaan tabung r = Jari-jari t = tinggi tabung LUAS PERMUKAAN TABUNG

  4. Jika Sebuah tabung yang mempunyai jari-jari 14 cm dan tinggi 10 cm maka tentukanlah luas permukaan tabung Contoh Soal luas permukaan tabung

  5. Diketahui : r = 14 cm t = 10 cm Ditanyakan : L permukaan tabung Jawaban : L = 2 r ( r + t ) = 2 14 ( 14 + 10 ) = 2.112 cm² Jawaban contoh soal

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