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hello : here is an solution
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a triangle's angles should add up to be 180 degrees. Three angles of 63's sum is 189
The only way to determine whether or not an outcome is unusual or not is to compare it with previous or future outcomes.
to get the equation of any straight line we only need two points off of it, hmmm let's use P and Q here and then let's set the equation in standard form, that is
standard form for a linear equation means
• all coefficients must be integers, no fractions
• only the constant on the right-hand-side
• all variables on the left-hand-side, sorted
• "x" must not have a negative coefficient

