The United States is an example of which governmental system? A.
democratic republic
B.
communism
C.
dictatorship
D.
oligarchy

The lines marked by the letters a, b, and c on the map above represent a. chains of volcanoes b. earthquake fault lines c. thin strips of heavy forests d. major rivers that flow from north to south

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

What are canada’s major boundaries?