1. The height of the equilateral triangle is 9 cm. What is the radius (in cm) of the circle circumscribing the three vertices?





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  • By: anil on 05 May 2019 02.07 am
    ABC is an equilateral triangle with height = median = 9 cm
    Now, O is the circumcentre of the triangle and it divides the median in the ratio 2:1 => $$AO=frac{2}{(2+1)} imes9$$ => $$AO=frac{2}{3} imes3$$ => $$AO=2 imes3=6$$ cm => Ans - (B)
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