Diagonals of Parallelograms

Record the measures of segment AE and segment ED below, what do you notice about their measures?

Move point A, point B, or point C. Record the new measures of segment AE and segment ED below, what do you notice about their measures?

What name can we give point E in relation to where it lies on segment AD?

Record the measures of segment BE and segment EC below, what do you notice about their measures?

Move point A, point B, or point C. Record the new measures of segment BE and segment EC below, what do you notice about their measures?

What name can we give point E in relation to where it lies on segment BC?

Since E has the same name on segment AD and segment BC, what can we say segment AD does to segment BC?