AIME 2024a Problem 8
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Eight circles of radius are sequentially tangent, and two of the circles are tangent to and of triangle , respectively. circles of radius can be arranged in the same manner. The inradius of triangle can be expressed as , where and are relatively prime positive integers. Find . [asy] /* Made by Mathemagician108 */ pair A = (2,1); pair B = (0,0); pair C = (3,0); dot(A^^B^^C); label("", A, N); label("", B, S); label("", C, S); draw(A--B--C--cycle); for(real i=0.62; i<2.7; i+=0.29){ draw(circle((i,0.145), 0.145)); } [/asy]
Dataset text AIME 1983 to 2026. Quoted with source.
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