

Pelajaran tanpa judul
Presentation
•
Mathematics
•
8th Grade
•
Hard
NURHAYATI S.Pd. Nurhayati
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6 Slides • 0 Questions
1
BANGUN RUANG SISI LENGKUNG
Kelas/ Semester : IX/ Genap
Oleh Nurhayati, S.Pd
2
TABUNG
( LUAS PERMUKAAN TABUNG )
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Luas alas tabung = Luas tutup = Luas Lingkaran
Luas selimut Tabung = Luas persegi panjang = panjang x lebar
Some text here about the topic of discussion.
LUAS PERMUKAAN TABUNG
4
Luas Selimut Tabung = Luas Persegi Panjang
= Panjang x lebar
= Keliling Lingkaran x Tinggi Tabung
= 2π r x t
= 2π r t
Luas Alas Tabung = Luas Tutup = Luas Lingkaran = π r2 t
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KETERANGAN :
L = Luas Permukaan
r = Jari - Jari
t = Tinggi
Some text here about the topic of discussion.
L = 2π r ( r + t )
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Contoh :
Sebuah tabung berjari-jari 5 cm. Jika tingginya 5 cm dan π = 3,14, hitunglah luas permukaannya.
Penyelesaian:
Gunakan rumus:
L. tabung = 2πr(r + t)
L. tabung = 2 . 3,14 . 5 cm . (5 cm + 5 cm)
L. tabung = 2 . 3,14 . 5 cm . 10 cm
L. tabung = 314 cm2
Jadi, luas permukaan tabung adalah 314 cm2.
BANGUN RUANG SISI LENGKUNG
Kelas/ Semester : IX/ Genap
Oleh Nurhayati, S.Pd
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