MathDB
2013 ToT Spring Junior O p5, angle chasing, equal segments, 150^o

Source:

March 4, 2020
geometryanglesequal segmentsright angle

Problem Statement

In a quadrilateral ABCDABCD, angle BB is equal to 150o150^o, angle CC is right, and sides ABAB and CDCD are equal. Determine the angle between BCBC and the line connecting the midpoints of sides BCBC and ADAD.
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