Is a pattern of irregular yet repeated flow of expansion and contraction of aggregate economic activity.

 business cycle is defined as an "up and down movement"- this corresponds to expansion and contraction. This expansion and contraction is measured for example in the Gross Domestic Product (GDP) of a country.

This is a business cycle.

A business cycle is defined as an "up & down movement" that corresponds to expansion and contraction

Business cycles last from 2 to 12 years.

okay so since it is a pie chart and is circular then the overall degrees would be 360. if you divide 360 by 100 then you would get 3.6 which is what each percent of the pie chart is worth as an angle. okay so then you would multiply the 45 by 3.6 and you would get 162. the answer you are looking for is 162 degrees.

if this is correct please give brainliest