3.  sketch - preliminary drawing for later elaboration; "he made several studies before starting to paint"  sketch - a brief literary description  make a sketch of; "sketch the building"  sketch - short descriptive summary (of events)  sketch - describe roughly or briefly or give the main points or summary of; "sketch the outline of the book"; "outline his ideas"  sketch - cartoon: a humorous or satirical drawing published in a newspaper or magazine

4.  Why do we sketch?  Sketching is a way to communicate through pictorial drawings. It can express ideas that normal words can not. It is a rough description of an idea or thought.

6.  An orthographic sketch is a multi-view drawing. It typically depicts the top, front, and right side views of an object.

7. Please do an orthographic sketch of the above item.

9.  An isometric sketch a 3D like drawing of an item. It includes depictions of depth in a drawing.

10. X-Axis Y-Axis Quadrant I Quadrant II Quadrant III Quadrant IV

11. Z-Axis