How did Euclid contribute to learning during the Hellenistic Age?

He created a new alphabet.
He wrote a series of books about geometry.
He wrote a series of books about astronomy.
He founded the first library.

Which of these events related to the protestant reformationoccurred first in 1521?

Characteristics of what type of economic system are being described below? 1.economy in which some/all of the basic economic questions answered by central authority 2.trade generally limited to what is produced through the influence of the government a.command economies. b.market economies. c.traditional economies.

Describe the causes and effects of the war powers act