Segment Bisector

    Red: Segment
    Blue: Bisector
Keyboards, along with computers, are use in almost ever field of work. In the image above a segment between the keys on the is being bisected by a bisector. The bisector cuts the segment into two equal parts.



Vertical Angles

Black: Lines
Red: Vertical Angles
Carpenter creates vertical angles everytime he or she puts new tiles on a floor. Vertical angles are created when lines cross. Vertical angles can more than just right angles, they also be acute and obutse angles.

Non-congruent Alternate Interior Angles

Blue: Transversal
Red : Lines that are not parllel
In old blinds there are lines that are no longer parllel. I found this example of non-congruent alternate interior angles in a old pair of blinds. This object would be use by an Interior Designer.

Congruent acute angles

 

Blue: Acute Angles

The Sutong Bridge in china uses congruent acute angles in its design. In the field of constuction congruent acute angles are used  as well the right angle.

http://www.toray.com/aboutus/ourgroup/asia/asi_011.html

Three or More Coplanar Parallel Lines

Blue: Coplanar Parallel Lines
The lines on a football field are coplanar parallel lines.
The National Football League or NFL uses conplanar parallel lines on all their fields.
http://www.google.com/imgres?q=coplanar+lines&start=29&num=10&um=1&hl=en&safe=active&tbo=d&biw=1280&bih=894&tbm=isch&tbnid=DtI5JdBBaMiOfM:&imgrefurl=http://parkerbass1geometry.blogspot.com/2012/10/three-or-more-coplanar-this-football.html&docid=NAF0f2Acnh6_fM&imgurl=http://4.bp.blogspot.com/-Y83LrhXbiyQ/UICqbjWRRrI/AAAAAAAAAAc/4wggSMkGDzM/s1600/lunapic_135060087082622_7.gif&w=480&h=360&ei=Qn2iUMm6MujW0QH1roHIBw&zoom=1&iact=hc&vpx=450&vpy=263&dur=704&hovh=194&hovw=259&tx=146&ty=105&sig=112621608789265777111&page=2&tbnh=133&tbnw=170&ndsp=34&ved=1t:429,r:23,s:20,i:73

Angle Bisector

Red: Angle
Blue: Bisector
Beams that with extra support by a beam in the middle.
A company known as Connolly & Co. use these designs and structrues in building homes.
http://connollytimberframes.com/articles.html

Line That Are Perpendicular to a Plane

Blue: Lines
Wooded beams in a house.
The beams are perpendicular to the roof of the house.
One can find perpendicular lines on the same plane in construction sites and buildings around the world.
http://abouthouses.eu/node/595

Skew Lines

Blue: Skew Lines
Both lines in the image above are lines on to different planes, the lines are not parallel and are not vertical angles.
These lines are skew lines.
Construction worker create skew lines many times in a building.
http://www.google.com/imgres?q=building&um=1&hl=en&safe=active&tbo=d&biw=1280&bih=894&tbm=isch&tbnid=O08cY0IaTDMoBM:&imgrefurl=http://www.toledoblade.com/local/2012/10/08/Historic-downtown-building-falling-apart-fromneglect.html&docid=fOBRe2sJEBlXiM&imgurl=http://www.toledoblade.com/image/2012/10/08/800x_b1_cCM_z/The-historic-Nicholas-Building-downtown-has-fallen-into-serious-disrepair.jpg&w=800&h=1200&ei=RniUJn3Aq80QGYsICoDQ&zoom=1&iact=hc&vpx=221&vpy=149&dur=423&hovh=246&hovw=165&tx=87&ty=135&sig=112621608789265777111&page=2&tbnh=164&tbnw=114&start=42&ndsp=51&ved=1t:429,r:32,s:20,i:229