Jawab:
Penjelasan dengan langkah-langkah:
Keliling = 50
r = OB = OA
Keliling = OA + OB + Busur AB
OA + OB + Busur AB = 50
r + r + (¼ x 2 x phi x r) = 50
2r + (½ x phi x r) = 50
Kedua ruas kiri dan kanan dikalikan 2, agar perhitungan tidak rumit di pecahan.
4r + (phi x r) = 2 x 50
(4 + phi) x r = 100
r = 100/(4 + phi)
r = 100/(4 + 22/7)
r = 100/(28/7 + 22/7)
r = 100/(50/7)
r = 100 x (7/50)
r = 2 x 7
r = 14
Jadi, panjang OB adalah 14 cm.
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Jawab:
Penjelasan dengan langkah-langkah:
Keliling = 50
r = OB = OA
Keliling = OA + OB + Busur AB
OA + OB + Busur AB = 50
r + r + (¼ x 2 x phi x r) = 50
2r + (½ x phi x r) = 50
Kedua ruas kiri dan kanan dikalikan 2, agar perhitungan tidak rumit di pecahan.
4r + (phi x r) = 2 x 50
(4 + phi) x r = 100
r = 100/(4 + phi)
r = 100/(4 + 22/7)
r = 100/(28/7 + 22/7)
r = 100/(50/7)
r = 100 x (7/50)
r = 2 x 7
r = 14
Jadi, panjang OB adalah 14 cm.