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  1. ?

    How can I turn 17.6 into one significant figure?

    It's the beginning of chemistry. I think it's like 2 x 10^1 ... but I have a feeling it's wrong
  2. ?

    How do you find the sum of exterior angles of a triangle?

    The question is in an equilateral triangle, what is the difference between the sum of the exterior angles and the sum of interior angles? I got interior angles by 180(n-2) and got 180. So is the exterior 360? So the answer is 180? How would I find out?
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