A regular dodecagon \(P_1 P_2 P_3 \dotsb P_{12}\) is inscribed in a circle with radius \(1.\) Compute \((P_1 P_2)^2 + (P_1 P_3)^2 + \dots + (P_{11} P_{12})^2.\) sdf
I've drawn a diagram but I'm not sure what \(P\) stands for. Is it a vertex point, the side length of the dodecagon...?
