Transcription: A development is seen folding the three-dimensional object to create a single flat surface. It is a map of the surface of the object. Folded correctly, the flat surface will reform the original 3D object. Developments represent a departure from the strict discipline of descriptive geometry. In a development, all lines are shown in true length and all planes in true shape in a single view. Note, however, that the development is not unique. Many other possibilities exist. Only surfaces that can be generated by straight lines lines can be developed, that is prismatic solids, cylinders, and cones. ...
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