What is the international date line? describe its geographic location. why doesn’t it follow a straight line? why do we it ?

It is located at the 180° longitude, which is the east of Greenwich, United Kingdom. The International Date Line does not follow a straight line because it has to avoid countries or groups of islands. The main purpose of the zigzag pattern of the IDL is to avoid confusion regarding time.

we need the pie chart in order to

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.