Question 126
Be $Q$ a point on the circumference of diameter $AB$, being $Q$ different from $A$ e $B$. Be $QH$ The line perpendicular to $AB$ that passes through $Q$, being $H$ resident $AB$. the points of intersection of the circumference of diameter $AB$ and the center circumference $Q$ and lightning $QH$ are $C$ e $D$. prove that $CD$ passes through the midpoint of $QH$.