Download - Ppt ict
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Nama : Siti Marfuah
Mata kuliah : Media Pembelajaran Berbasis ICT
Prodi : Pendidikan Matematika, Universitas Sriwijaya
Dosen : 1. Prof. Dr. H. Zulkardi, M. I. Komp., M.Sc.
2. Meryansumayeka, S.Pd.,M.Sc
3. Septy Sari Yukans, S.Pd., M.Sc
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Materi Latihan SoalSK dan KD
By: Siti Marfuah
PROGRAM
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Standar Kompetensi:Geometri dan Pengukuran2. Memahami sifat-sifat tabung, kerucut
dan bola, serta menentukan ukurannya
Kompetensi Dasar :2.2 Menghitung luas selimut dan
volume tabung, kerucut dan bola
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MATERI UNTUK PEMBUKTIAN RUMUS LUAS BOLA
Lingkaran
Diameter
d = 2r
Luas Permukaan Lingkaran
r = jari-jari
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MATERI Luas Permukaan Bola
Kulit jeruk dikupas dan tempelkan di lingkaran yang
diameternya sama dengan diameter belahan
Luas Bola = Luas 4 Lingkaran
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MATERI Volume Bola
Tinggi kerucut = jari-jari = r
Dari proses di atas terlihat bahwa:
Volume bola = 2 x volume kerucut 2
1
tr 2
3
12
Volume bola = 2 x volume bola 2
1
3
3
22 r
3
3
2r 3
3
4r
(t = r)
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Latihan Soal1. Dua bola mempunyai jari-jari r1 dan r2
dan masing masing mempunyai luas
kulitnya L1 dan L2. Apabila r1 = 4r2. maka
L1:L2 adalah...
A. 1 : 4
E. 2 : 9
C. 1 : 32 D. 1 : 64
B. 1 : 16
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Latihan Soal
A. 450 cm2
D. 1462 cm2
C. 562 cm2 D. 442 cm2
B. 462 cm2
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Latihan Soal
Dua buah bola mempunyai persamaan
volume 8 : 27. Perbandingan jari-jari kedua
bola itu adalah...
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yes you’re answer true!
1 2
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No, you’re answer wrong!
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No, you’re answer wrong!
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No, you’re answer wrong!
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LUAS PERMUKAAAN DAN VOLUME BOLA
PROGRAM
Jari-Jari Satuan
Luas Permukaan Volume
HasilHapus