Question 255852
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The perimeter of any polygon is simply the sum of the measures of the sides.  Here, you have three sides:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 2x\ +\ \left(x\,+\,19\right)\ +\ \left(3x\,+\,6\right)]


Just collect like terms to simplify.  Once you have a simplified expression, substitute 5 for the variable and do the arithmetic.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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