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Symmetries of Squares

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Explanations 1

A square has 4 lines of symmetry: the diagonals and the line segments connecting the opposite midpoints of each side. So if one was to fold a square in half to make 2 rectangles…
By Freya Edholm

Problems 1

Four complex numbers lie at the vertices of a square in the complex plane. Three of the numbers are 1+2i1+2i1+2i, −2+i-2+i−2+i, and −1−2i-1-2i−1−2i. Find the real part of the fo…