Find the midpoint of the segment joining (a,b)(a, b)(a,b) and (c,d)(c, d)(c,d).
(fraca+b2,fracc+d2)(\\frac{a+b}{2}, \\frac{c+d}{2})(fraca+b2,fracc+d2)
(fraca+c2,fracb+d2)(\\frac{a+c}{2}, \\frac{b+d}{2})(fraca+c2,fracb+d2)
(ac,bd)(ac, bd)(ac,bd)
(fraca−c2,fracb−d2)(\\frac{a-c}{2}, \\frac{b-d}{2})(fraca−c2,fracb−d2)