Answer:
Check it below, please
Step-by-step explanation:
Hi there!
Let's prove segment AB is perpendicular to CD. Attention to the fact that a two column proof has to be concise. So all the comments can't be exhaustive, but as short as possible.
Let's recap: An isosceles triangle is one triangle with at least 2 congruent angles.
Statement Reason
[tex]\overline{AB} \cong \overline{AC}\\[/tex] Given
[tex]\widehat{ACB} \:bisects\: \overline{AB}[/tex] Isosceles Triangle the altitude, the bisector coincide.
[tex]\overline{AD} \cong \overline{DB}[/tex] Bisector equally divide a line segment into two congruent
[tex]m\angle CDA =m \angle CBD=90^{\circ}[/tex] Right angles, perpendicular lines.
[tex]\overline{CD}\perp \overline{AB}[/tex] Perpendicular Line segment
