Two parallelplanes
The orangeplaneand greenplaneare
bothperpendicularto the blue plane.If you thinkabouta table,the top of the tableand the floor belowit are usuallyin parallelplanes.
The otherof relationshipyou needto understandisskewlines.Skewlinesare linesthat are in different
planes,and neverintersect.Segmentsand rays can also be skew. In the cubeshownbelowsegment
and segment are skew. Can you nameotherpairsof skewsegmentsin this diagram?(Howmany
pairsof skewsegmentsare therein all?)
Example 2
Whatis the relationshipbetweenthe front and side of the buildingin the picturebelow?(Source:http://commons.wikimedia.org/wiki/File:California_Hotel_(Oakland,_CA).JPG,License:Creative
CommonsAttributionShareAlike2.5)
.JPG,License:Creative){kind=link}