Download - Lingkaran
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Roda sepeda. Yang ketiga….
Lampu lalu lintas. Yang keempat….
Bola mata. Yang kelima….
Uang koin.Dan masih
buaaanyaaaklagi….!!!
Stooooooopp!!!!
Contoh bendaberbentuk
lingkaran. Yang pertama….
Jam weker. Yang kedua….
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A
OC
B
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K
S
O B
M
SUDUT PUSAT KOS
SUDUT PUSAT BOS
SUDUT PUSAT SOM
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O
A
B
S
T
SUDUT PUSAT AOB
SUDUT KELILING ATB
SUDUT KELILING ASB
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Hm…aku ingin membagi kueulang tahunku dengan
teman-temanku…Bagaimana ya caranya???
Aku bisa bantu kamumotong kue itu John !!!!
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d = 35 m
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MENENTUKAN NILAI
1. Menyediakan penggaris/meteran, tali, danbeberapa benda berbentuk lingkaran.ALAT-ALATbenda berbentuk lingkaran
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MENENTUKAN NILAI
2.Membuat tabel seperti berikut untukmancatat hasil pengukuran.
Objek d K K/d
1
2
3
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MENENTUKAN NILAI
3. Mengukur diameter benda berbentuk lingkaran.
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MENENTUKAN NILAI 4. Melilitkan tali mengelilingi benda, lalu
mengguntingnya pada pertemuan ujung danpangkalnya
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MENENTUKAN NILAI
5. Melepaskan talitersebut dan
membentangkannya, kemudian mengukurpanjang tali tersebut
dengan penggaris.
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MENENTUKAN NILAI
6. Membagi keliling benda dengan diameternyadan mencatatnya dalam tabel pengamatan.
Objek d (cm) K (cm) K/d
1 4,4 13,8 3,136
2 6,7 20,9 3,119
3 12,0 38,1 3,175
Rata-rata K/d = 3,143
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Sebuah uang koin berbentuklingkaran dengan jari-jari 2,2
cm. uang tersebut mempunyailubang di bagian tengah dengan
jari-jari 0,2 cm. Hitung luasuang koin tersebut!
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Berapa panjanglintasan yang dilalui oleh
anjing?
120
7 m
7 m
Seekoranjing
berjalan dipinggirkolamyang
berbentuklingkaranseperti
gambar disamping.
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7 m
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