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Well I hope so. Fingers crossed this time.
so its 72?
Curious. See diagram. I should appeal that mark.
but its wrong
Yes, well done.
ok so is \theta 144 degrees?
If you rotate just enough to move all the points on just one place, let's call the an angle of D degrees.
OPQRSTUVWX is a regular decagon. A rotation of \theta degrees about U maps X to R. Given \theta < 180 degrees, find \theta