6. In a circle with centre \( \mathrm{O}, \mathrm{A} 13 \) is a chord and \( \mathrm{OM} \perp \mathrm{AB} \) meets the circle in C . If \( \angle \mathrm{AOC}=80^{\circ} \), find \( \triangle \mathrm{MCB} \).
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We have a circle with center \( O \), chord \( AB \), and \( OM \perp AB \). \( OM \) meets the circle at point \( C \). The angle \( \angle AOC = 80^\circ \). Show more…
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