Question

for drawing objects from a viewpoint looking up or down, perspective is utilized, which includes three vanishing points.
the illusion of and space on a flat surface is a key aspect of perspective drawing.
the formula $(n - 2)\times180^{\circ}\div n$ is used to calculate the angle of a polygon.
and shadow are used in perspective drawing to add realism and depth.
the technique of varying tone to suggest volume and form in perspective drawing is called

Explanation:

1. Three - point perspective is used for drawing objects from an up - or down - looking viewpoint.
2. Perspective drawing creates the illusion of depth and space on a flat surface.
3. The formula \((n - 2)\times180^{\circ}\div n\) calculates the interior angle of a polygon.
4. Light and shadow add realism and depth in perspective drawing.
5. Varying tone to suggest volume and form in perspective drawing is called shading.

Answer:

1. Three - point
2. depth
3. interior
4. Light
5. shading