Construct segment AB[br][br]Construct a perpendicular line through point A.[br][br]Put point C on this line[br][br]Construct a perpendicular line through point B.[br][br]Construct a perpendicular line through point C.[br][br]Place point D at the intersection of the perpendicular lines.[br][br]Hide the 3 lines and then construct the segments.
Measure the 4 angles and length of the 4 segments
What is the measure of each angle?
Are there any segments that are congruent?
Yes, both pairs of opposite sides are congruent.