Geometry, Theorems and Problems


Problem 235. Parallelogram, Transversal line, Perpendicular lines, Measurement

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

Parallelogram, transversal line, Distance 



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