Easy
Write whether the following statement is True or False. Justify your answer.
The Euclidean geometry is valid only for figures in the plane.
The Euclidean geometry is valid only for figures in the plane.
(TRUE) True. Euclidean geometry is based on the assumption of a flat surface (Euclidean plane). It fails on curved surfaces. For example,on a spherical surface,the sum of the angles of a triangle is always greater than $180^{\circ}$.
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