Question 333202
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I think you mean "What would be the missing endpoint <i>if</i> S is the midpoint..."


Use the midpoint formulas:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x_m\ = \frac{x_1 + x_2}{2}] and


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ y_m\ = \frac{y_1 + y_2}{2}]


Substitute the coordinates of S for *[tex \Large x_m] and *[tex \Large y_m] and the coordinates of T for *[tex \Large x_1] and *[tex \Large y_1].  Then solve the two equations for *[tex \Large x_2] and *[tex \Large y_2] which will be the coordinates of R.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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