To complete the sentence, in Masaccio's Holy trinity, it can be seen that the vanishing point is centered in the middle of the horizon line which is directly in front of the viewer. In the arts, the vanishing point refers to the point where two parallel lines seem to converge.
Answer:
The first is an onion dome. The second is a barrel vault. The third is a rotunda dome. The fourth is a corbel arch.
Answer:
squares, triangles and ovals are very common.
Explaination: you have to try look look at the basic shapes of objects you are trying to draw, for example, the base shapes i use when sketching a nose are a circle at the tip, for rounder noses, and a triangle for the general shape.