Supporting information for Flexible intuitions of Euclidean geometry in an Amazonian indigene group
Résumé
Equations of Planar and Spherical Geometry. Triangle completion in planar geometry. Consider a triangle ABC on the plane where the angles α and β at the base are known as well as the distance c between the points A and B and where the distances a and b and the angle γ are unknown (Fig. S8). The angle γ can be derived from the fixed sum of the angles (Eq.
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