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Heron Angles, Heron Triangles, and Heron Parallelograms
Published 1 May 2019 in math.GM | (1905.00895v1)
Abstract: Heron angle: both its sine and cosine are rational Heron triangle: all its sides and area are rational Heron Parallelogram: all its sides, diagonals and area are rational We give one-to-one (bijective) parametrizations for all three concepts.
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