The 4th topic

Many objects consist of a set of simple geometric shapes, such as cubes, cones, spheres, cylinders, prisms, pyramids, etc., and intersecting shapes have a common intersection line, which is necessary to construct orthogonal, axonometric projections of the model and get its surface net.

One of the most commonly used methods for constructing such lines of intersection of shapes is the use of auxiliary cutting planes.

Watch the videos and please answer questions.

4.2.1.1. Use the three-dimensional objects for general inspection, rotate the objects group for the exercise completing. 

4.2.1.2. Use the 3D object's video to complete the exercises and answer the questions.

4.2.1.3. Use the 3D object to complete the exercises and answer the questions in the interactive video.

4.2.1.4. Use the three-dimensional object for the exercises completing and answer the test question. 

4.2.1.5. Please answer questions in this interactive video