Nationalist composers sometimes included in their compositions. a. spoken word b. improvisation c. folk melodies d. gregorian chant

He developed the concept of linear perspective, and he had the ability to solve architectural problems using mathematics.

It depends on what type of third separates the three notes.for example: if you have two mayor thirds is an "aumented chord"if you have two minor thirds is an "diminued chord"if you have one mayor first and then one minor is a "mayor chord"and inverted is a "minor chord"