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OpenStudy (anonymous):
Circumcircle of an equilateral triangle ABC is x^2+y^2+2gx+2fy=0.Then its incircle is ?
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OpenStudy (shubhamsrg):
incenter and circumcenter of equiliateral triangle coincide
OpenStudy (shubhamsrg):
note that the given circle passes through origin
OpenStudy (anonymous):
the centre would be same for both circles, calculate radius of circumcircle.. using that result u can calculate radius of incircle
OpenStudy (shubhamsrg):
just construct a good figure and you'll get it you'll have to make use of the length of radius of circumcircle and one angle 30 degrees
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