## Natural Geometry: An Introduction to the Logical Study of Mathematics. For the Use of Schools, and Technical Classes. With Explanatory Models. Based Upon the Tachymetrical Works of Edouard Lagout |

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13J cubic inches 27 cubic inches 9 square ABCD alternate angles angle DEF angles are equal angles equal band base and height base multiplied bisect centre chord cone containing the right corresponding sides cube root cylinder diameter diverge equal angles equal sides equal to AC equilateral triangle evident five-sided prisms formula found equal four-sided figure four-sided pyramid Geometry given straight line half its height heap hexagon hypotenuse inches long known side layers line AC lineal inches long prisms mean circumference measure for measuring method models multiplied by half parallel sides parallelepiped parallelogram perpendicular plane polygon produced quantity radius2 rectangle rectangular rectangular parallelepiped regular polygon respectively equal right-angled triangle rooo short prism shown side BC similar triangle sloping height solid sphere square inches square of radius square root surface Tachymetry third side three angles trapezium triangle ABC triangles are equal triangles models