[Ella G]

Hi there! I’m going through this lesson but I got stuck trying to understand the cylinder part (I always go through the videos once just watching and trying to understand before I start practicing along while rewatching). My challenge is, I get what the center line does, but then the instructor draws a line at a perfect 90 degrees to the center line and I don’t see what that line does. He says it helps me “quickly see the lines of intersection” which I should connect to the lower ellipse, or that it helps me detect “where these ends are”. I feel like I’m being an absolute dunce about this, but aren’t these ends just where I drew the ellipse? How does it help me to draw in an ellipse first and then a line 90 degrees to the center line? Thanks in advance for helping me figure out what that second line actually does!

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