Reminder
draw any triangle ABC and let D be the midpoint of AB .Using ruler and compasses draw the line through D parallel to BC to meet AC in E . Measure DE,AE,and EC. Do you find that AE=EC and DE=1/2BC?
Reminder
draw any triangle ABC and let D be the midpoint of AB .Using ruler and compasses draw the line through D parallel to BC to meet AC in E . Measure DE,AE,and EC. Do you find that AE=EC and DE=1/2BC?