Contents UNITS 5 I n t e r p r e t i ng v i ews o f 3 - D ob j e c t s 35 • Isometric perspective. Interpreting three views • Interpreting views of other 3-D objects: with inclined planes, with oblique planes, with curved surfaces and with different surfaces 6 L i n e a r p e r s p e c t i v e I 43 • Definition and elements of linear perspective • Frontal perspective. Construction of frontal perspective 7 L i n e a r p e r s p e c t i v e I I 51 • Oblique perspective • Construction of figures in oblique perspective, given the measuring points • Construction of a pyramid in oblique perspective F i na l a c t i v i t i e s 57 • Activities bringing together all the points covered in this book • Digital resources: draw a camera with LibreCAD G l o s s a r y 63 Technical drawing terms that are used in this material UNITS 1 Po l ygon s and a r c l i nk s 5 • Definition of a polygon • Elements of a regular polygon • Classification of polygons, triangles and quadrilaterals • Construction of a regular heptagon • Construction of a regular nonagon • Construction of arc links • Construction of arches 2 P r o j e c t i v e g e ome t r y 15 • Projective geometry and representation techniques • Representation of objects using projective geometry: description of the dihedral system • Nomenclature in the dihedral system. Representation of a point in the dihedral system • Representation of a line in the dihedral system 3 Vi ews 21 • Definition of views • The European system • The American system • Selection of views. Construct the main views of an object 4 Ne t s o f g e ome t r i c bod i e s 27 • Definition of geometric bodies and their nets • The nets of geometric bodies formed by flat surfaces: a cube or hexahedron and a tetrahedron • The net of a right cone • The net of an oblique prism
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