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=https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhe_0l0Jgyo53WhIVDQmX8SzKVK-3LLhIEufXAPGYpLqh0WH2_5FXaLpGuBe5D5NnTuSoIC0hEtNVyfkd2rID9J9vVw8vOsKdsK2fRwG_oSF9bwk-wYio0kGKrnzuo3vlC2o-lnX47xfVo/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