Proof of the Midpoint Formula Let P and Q be the points (x1, y1) and (x2, y2), respectively, and let M be the point with coordinates
Use the distance formula to compute the following:
(a) The distance d from P to Q;
(b) The distance d1 from M to P;
(c) The distance d2 from M to Q.
(d) Verify that d1 = d2.
(e) Show that d1 + d2 = d. [Hint: Verify that and .]
(f) Explain why parts (d) and (e) show that M is the midpoint of PQ.
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