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Circumcentre

The radii of ...

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The radii of the escribed circles of triangle ABC are r_a, r_{b } and r_c respectively. If r_a+r_c = 3R and r_b +r_c =2Rthen the smallest angle of the triangle is (where R is the circuradius of triangle ABC)

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△ A B C, r_{A}, r_{B}, r_{C}

are the radii of the circles which touch the incircle and the sides emanating from the vertices

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r_{c}

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r_{a} + r_{b} = 3 R

r_{b} + r_{c} = 2 R

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\frac{r_{C^{+}}}{r_{B^{-}}}

0.50

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