My calculator gave me 22 but download Calculate84 and see if you get the same answers
10 * 450 / 404 * 36 / 40 =
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10.0247524752 liters
Source:
http://www.1728.org/combined.htm
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The answer is 9 because half of 14 is 7, and 7+2=9
90 degrees you are looking to your side
180 degrees you are looking behind you
around origin of 0,0
the image is flipped into the negative world if it is in posiitve or vice versa