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Mathematics, 12.04.2020 02:14, samueltaye
A regular dodecagon P_1 P_2 P_3 \dotsb P_{12} is inscribed in a circle with radius $1.$ Compute \[(P_1 P_2)^2 + (P_1 P_3)^2 + \dots + (P_{11} P_{12})^2.\](The sum includes all terms of the form $(P_i P_j)^2,$ where $1 \le i < j \le 12.$)
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A regular dodecagon P_1 P_2 P_3 \dotsb P_{12} is inscribed in a circle with radius $1.$ Compute \[(P...
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