# triangle, parallelograms, incidence

- Author:
- Dick Lane

- Topic:
- Parallelogram

Use the following steps to construct a figure.

- Pick non-collinear points A, B, C [note: you can move any of these points]
- Pick point M inside triangle A.B.C [note: you can move point M]
- Locate point M_c such that quadrilateral A.M.B.M_c is a parallelogram.
- Locate point M_b such that quadrilateral A.M.C.M_b is a parallelogram.
- Locate point M_a such that quadrilateral B.M.C.M_a is a parallelogram.

*The Generalized Conception in Problem Solving*, A. V. Brushlinskii,

*Analyses of Reasoning Processes*, pages 45--55

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