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Sebuah kawat panjang 20 m dibentuk menjadi sebuah lingkaran. Tentukan diameter lingkaran tersebut!

Rani Maharani

Soal:

Jawaban:

Diketahui:

Panjang kawat = 20 m

Dicari:

Diameter lingkaran

Pembahasan:

Rumus panjang lingkaran adalah L = πd, sedangkan rumus keliling lingkaran adalah K = πd. Karena panjang kawat 20 m, maka:

K = 20

πd = 20

d = 20/π

d = 6,37

Jadi, diameter lingkaran tersebut sekitar 6,37 meter.

Keterangan:

π (pi) dapat diambil sebesar 22/7 atau 3,14. Pada pembahasan ini, digunakan nilai π = 3,14.

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