
presentasi mapel matematika rumus keliling lingkaran
Presentation
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Mathematics
•
6th Grade
•
Practice Problem
•
Hard
Susi Susiana
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4 Slides • 5 Questions
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Selamat Pagi semua
kelas 6
SDN Mohamad Toha
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MATEMATIKA
MENGHITUNG KELILING LINGKARAN
Rumus K = 2πr atau K = πd. K merupakan lambang keliling lingkaran. Sedangkan nilai π yaitu 22/7 atau 3,14
3
r = 1/2 x d (diameter)
contoh: Jari-jari lingkaran dengan diameter 24 cm adalah...
Pembahasan:
Diameter = d = 24 cm
Jari-jari lingkaran = 1/2 x d
r = 1/2 x 24 cm
K = 12 cm
Rumus mencari Jari - jari (r)
D = 2 x r (jari-jari)
contoh: Diameter lingkaran dengan jari-jari 14 cm adalah...
Pembahasan:
Jari-jari = r = 14 cm
Diameter lingkaran = 2 x r
d = 2 x 14 cm
d = 28 cm
Rumus mencari Diameter (d)
Perhatikan rumus dibawah!
4
Sebuah lingkaran mempunyai jari-jari 35 cm. Hitunglah berapa keliling dari lingkarang tersebut. Pembahasan: Diketahui r = 35 cm
Ditanyakan K = ?
K = 2 x Л x r
K = 2 x 22/7 x 35
K = 220 cm.
Rumus K = 2πr atau K = πd. K π yaitu 22/7 atau 3,14
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Selamat Pagi semua
kelas 6
SDN Mohamad Toha
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