# Elementary Geometry

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## Elementary Geometry.

### Plane Geometry.

 Lecture I. Definitions: Lines, Angles, Triangles, Quadrilaterals, Polygons, Circles. II. Construction of rectilineal figures from given sides. Bisection of lines and angles. III. Angles and rectilineal figures. IV. Parallels: The division of lines into parts; Proportionals. V. The circle: inscribed and circumscribed figures. VI. The circle: Arcs and Tangents. VII. Rectilineal figures described about and inscribed in other rectilineal figures VIII. Inscribed Semicircles. IX. Scales: plane and diagonal, scale of chords, use of scales, geometrical pattern drawing.

### Solid Geometry.

 Lecture X. Definitions of Elementary solids: cube, prism, cylinder, cone, sphere; meaning of the terms Vertical and Horizontal planes, projectors, plans, elevations and sections. XI. Given the projection of a solid in either plane, to find its projection in the other plane; vertical and horizontal sections. XII. The circle and its projection applied to the cylinder, cone and sphere.