Because there are 20 sides, the chances of any one side turning up is 1/20.
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Some people believe that numbers can predict everything from when we'll die to what kind of life we may have. The belief in numbers in this way is called numerology.
18. I'm assuming that you need to know the number of triangles so you can find the sum of the interior angles (since each triangle has 180˚, all you have to do is multiply). If I'm correct in my assumption about your reason, then just remember that you'll always subtract 2 from the number of sides before multiplying by 180.
When polls are taken, they tend to predict the outcome of political elections.
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