Angles in a parallelogram are considered adjacent if they do share a side.

Record the measures of angle A and angle B below, what do you notice about their measures?

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

Record the measures of angle B and angle D below, what do you notice about their measures?

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

Record the measures of angle D and angle C below, what do you notice about their measures?

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

Record the measures of angle C and angle A below, what do you notice about their measures?

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

What can you conclude about the measures of the adjacent angles of a parallelogram? What is the math term for these kinds of angles?