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Plane Geometry - Bruce E. Shapiro

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SECTION 11. THE UCSMP AXIOMS 47Axiom 20 Distance is preserved by reflection.Axiom 21 Angle measure is preserved by reflection.Axiom 22 Orientation is reversed by reflection.Area AxiomsAxiom 23 Given a unit region, every polygonal region has a unique area.Axiom 24 The area of a rectangle with dimensions l and w is lw.Axiom 25 Congruent figures have the same area.Axiom 26 The areas of the union of two non-overlapping regions is thesum of the areas of the regions.Volume AxiomsAxiom 27 Given a unit cube,every solid region has a unique volume.Axiom 28 The volume of box with dimensions l, w, and h is lwh.Axiom 29 Congruent solids have the same volume.Axiom 30 The volume of the union of two non-overlapping solids is thesum of their volumes.Axiom 31 Given two solids and a plane. If for every plane which intersectsthe solids and is parallel to the given plane the intersections have equalareas, then the two solids have the same volume.Revised: 18 Nov 2012 « CC BY-NC-ND 3.0.

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