Please see the image to understand my question:

2d lines projected onto horizontal floor

Given the angle theta, and 3 parallel lines, the top line being 5 unit distances away from the middle line. How do I calculate the length of the line segment labelled ? in the image?

  • $\begingroup$ $\sin$ is your friend. $\endgroup$ – Michael Hoppe Jun 9 at 12:36
  • $\begingroup$ sine takes an angle in radians and returns a number between -1 and +1, how does that help me? $\endgroup$ – George Jun 9 at 13:11
  • $\begingroup$ $\sin(\mathrm{theta})=5/\mathrm{?}$. Now solve for ?. $\endgroup$ – Michael Hoppe Jun 9 at 14:27
  • $\begingroup$ so 5/sin(theta) thank you $\endgroup$ – George Jun 9 at 14:38
  • $\begingroup$ You're welcome. $\endgroup$ – Michael Hoppe Jun 9 at 14:39

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