Which of the following is true of the use of masks in theatre? (Select all that apply.) Check All That Apply
a. Masks provide a separation between the actor and the character.
B. Masks appeared historically in the theatrical traditions of many different cultures.
C. Masks are no longer used in present-day theatre.
D. Masks were only used in tragedy.

The linear perspective changed the quality of art because it gave art a sense of reality. it gave the illusion that the background and surroundings were actually close and/or far and a sense of depth. linear perspective change the quality of art following its birth the renaissance period as they want the art to be more realistic and they believe one way to achieve it is to use the method of linear perspective. it uses the principle of math to realistically portray space and depth in art. 

2.25 because you subtract the two

If you could give us the questions i can see if i can you! : )