The purpose of an initial sketch of an object project is so that you know exactly what the object is going to look like so you can have a clear picture in your head. If you didnt do an initial sketch, you wouldnt know any measurement for the object or if the parts all fitted together. So by doing an initial sketch, your project will always work.
The purpose is to get a simple of idea on what is planned on being made. It is also easier to visualize the finished project with a sketch in front of the artist.
sketch
Sketch
sketch out the shape your argument will take.
line that capture thatt appearance of an object or impression
To create a realistic sketch of an object, it is important to understand the basic shapes and forms that make up the object, as well as its proportions and perspective. Observing light and shadows will also help in adding depth and realism to the sketch. Practice and patience are key to improving your sketching skills over time.
An orthographic projection.
start by taking a software or sketch pad and draw out the dementions.
I believe there may be as many answers for this as there are numbers of sketchers. Sketches do not necessarily have a formula that they are made from. Any number of lines on any random sketch may be disproportionate and differ in directional orientation from any other number of lines on the same sketch. Sometimes the first lines of a sketch denote the position or orientation of an object rather than size, therefore they have nothing to do with the object's size proportions. I hope this at least partially answers your query.
you can't, it's just a object, but you could flatten the object then put it on with a brush.
Isometric, Orthographic and Perspective, but perspective is not required to depict an object.
Orthographic projection