In analytic geometry, solid lines are used for known lines and dashed lines are used for auxiliary lines. If the connection CB is mentioned in the title, but not in the picture, then this sentence should be drawn with a solid line under known conditions. To complete this problem, you need to connect AB. This sentence belongs to the auxiliary line in the process of proving (solving problems), and you should use the dotted line at this time.
What are the finance courses in universities?
Political economy, economic mathematics foundation, basic accounting, statistical