Who were the 3 major players of enlightenment?

What is the area of the trapezoid shown ?

Don’t mind the already marked answer but taking it now

Jackson pollock described his art style in the following quote: “new needs need new techniques.… it seems to me that the modern painter cannot express this age, the airplane, the atom bomb, the radio, in the old forms of the renaissance or of any other past culture. each age finds its own technique.” what point is pollock making about the new styles of art?