MPSC Rajyaseva 2013 CSAT — Question 70
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70. त्रिकोण ABC हा समभुज त्रिकोण आहे. तर OBC हा समद्विभुज त्रिकोण आहे. जर ∠BOC हा 100° चा असेल तर ∠ACO किती असेल? Triangle ABC is an equilateral triangle. Triangle OBC is an isosceles triangle. If angle BOC is 100°; then how much will the ∠ACO be ?
a)20°✓ Correct
b)30°
c)60°
d)45°
Since Triangle ABC is equilateral, all its internal angles are 60°. Using properties of adjacent angles and triangle angle sums along with the given angle BOC = 100°, angle ACO can be deduced geometrically.
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