in a fig. O is the centre of the circle OC = 5 cm and AB = BC = 2(under root 5) . Find the length of AC.
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AO=5cm (radius of the same circle)
AO+OC+AC=180°
5+5+AC=180
10+AC=180
AC=180-10
AC=170
AO+OC+AC=180°
5+5+AC=180
10+AC=180
AC=180-10
AC=170
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