Geometry, Theorems and Problems

Problem 234. Parallelogram, Line through a vertex, Perpendicular lines

The figure shows a parallelogram ABCD, AC' is a line through the vertex A. If b, c, and d are the perpendiculars drawn from B, C, and D to the line AC', respectively, prove that: b = c + d. View or post a solution.
  

Problem 234: Parallelogram, Perpendicular lines

 

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