MathDB
ASU 417 All Soviet Union MO 1985 circle's distance in different cube's planes

Source:

August 5, 2019
3D geometrygeometrycirclesdistancecube

Problem Statement

The ABCDA1B1C1D1ABCDA_1B_1C_1D_1 cube has unit length edges. Find the distance between two circumferences, one of those is inscribed into the ABCDABCD base, and another comes through points A,CA,C and B1B_1 .
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