Improper elements. Conics. Basic concepts and focal properties. The basic properties of projection. Parallel projection. Central collineations and axial affinity in plane. Projection with dimensions. Position tasks. Metric problems. Projection of a circle. Orthogonal axonometry. Position tasks. Metric problems and the projection of a circle in coordinate planes. Elementary surfaces and solids. Basic concepts and properties. Planar cut. Intersections with a line. Tangent plane. Topographical surfaces.