
Bangun Ruang Sisi Lengkung
Presentation
•
Mathematics
•
9th Grade
•
Hard
Khoirul Anam
FREE Resource
5 Slides • 0 Questions
1
By Khoirul Anam
SMP Negeri 5 Pelepat Ilir
2
Tabung adalah bangun ruang sisi lengkung yang dibentuk oleh dua buah lingkaran identik yang sejajar dan sebuah persegi panjang yang mengelilingi kedua lingkaran tersebut
Khoirul Anam
3
Khoirul Anam
Luas tabung ekuivalen dengan jumlahan semua luas bangun penyusun dari jaring-jaring tabung
Misalkan terdapat tabung dengan jari-jari r dan tinggi t, maka:
L= Luas jaring-jaring tabung
L= 2 x Luas lingkaran + Luas ABCD
L= 2πr2 + AB x BC
L= 2πr2 + 2πr x t
L= 2π(r+t)
4
Tentukan volume tabung jika diketahui jari-jarinya 2 cm dan tingginya 4 cm? (π=3,14)
jawab:
V = Luas alas x tinggi
V = πr2 x 4
V = 3,14 x 22 x 4
V = 3,14 x 4 x 4
V = 3,14 x 16
V = 50,24
Jadi volume tabung adalah 50,24 cm3
Khoirul Anam
5
Volume Tabung
Volume tabung adalah hasil perkalian dari luas alas tabung dengan tinggi tabung atau dapat dirumuskan sebagai berikut:
V = La x t
V = πr2 x t
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Khoirul Anam
By Khoirul Anam
SMP Negeri 5 Pelepat Ilir
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