Next,find the lengthof the oppositeside,. Use for and for.So, ; they haveequallengths.Now you needto showthat and are parallel.
You can do this by findingtheir slopes.Recallthat if two lines havethe sameslope,they are parallel.
So, the slopeof. Now, checkthe slopeof.So, the slopeof. Sincethe slopesof and are the same,the two segmentsare
parallel.Now that haveshownthat the oppositesegmentsare both paralleland congruent,you can identify
that the shapeis a parallelogram.
LessonSummary
In this lesson,we exploredparallelograms.Specifically, we havelearned: