Segment Bisector

This is a five string bass that contains a segment bisector (bisector in pink, and segment in red). The third string cuts the segment formed at the top of the first pickup in half. The five string bass produces the same sounds as the more common four strong bass, and then some due to its extra string. The five string bass is used in a variety of music groups. A few bands or performers that have used this bass are Metallica, Dave Matthews Band, and Paul McCartney. 

I found this image online at: http://www.zzounds.com/item--ESPD5

Adjacent Non-Supplementary Angles

This is an image of a bike wheel's spokes that have adjacent non-supplementary angles (one in orange, and the other in blue). The angles share a side, and when they are combined do not equal 180°. The spokes of the bike wheels give support to the wheels. Bike wheels like this attach to bikes which can be used for transportation, exercise, or leisure. Cyclists, mailmen, and fitness enthusiasts all use bike wheels like this to power their bikes. 

I found this image online at http://www.redemptoristsesker.ie/2013/08/soul-food-for-hungry-adult-communities-sept-1-2013-22nd-sunday-in-ordinary-time/

Angle Bisector

This bow and arrow contains an angle bisector. The arrows pulls the bow back forming two angles, and since the arrow is centered, the angles are congruent. Therefore, the arrow is bisecting the bow. Bows and arrows are used for hunting, but more commonly for sport. Archers use bows for target practice, while hunters use bows to try to kill animals. 

I found this image at http://clipartpin.com/category/bow-and-arrow-clipart

Skew Lines

These street signs are an example of skew lines (drawn in yellow). The lines at the top of each street sign are not parallel, yet they do not intersect as they are on different planes in different directions. Street signs are used for navigation. Drivers use street signs everyday to figure out where to go. However runners, cyclers, and mail delivery people look at street signs to stay on route. 

I found this image online at http://macarthurmetro.org/201006/feature

Congruent Obtuse Angles

This is an image of a fighter plane that contains two congruent obtuse angles on top of each wing (drawn in red). The wings hit the body of the body of the plane at an angle that is greater than 90°, but less than 180° for aerodynamic purposes. This creates two congruent obtuse angles. Fighter planes like this are used in the US military, along with international militaries. They are designed to be fast and equipped with weapons to make them efficient air fighting machines. These planes are flown by only the most equipped pilots along side their naviagator.

I found this image online at http://www.mi9.com/fighter-plane_19450.html

Supplementary Angles that are not a Linear Pair

This is a newspaper that contains two supplementary non-linear angles in its corners (highlighted in green). The newspaper is rectangular and each corner is a right angle. Two of the corners together make a 180° angle, and therefore are supplementary. Newspapers contain news on current events in categories like sports, politics, and national news. Local newspapers like this one also include local happenings. Archived newspapers are used by librarians, writers, students, and historians to research the past. I took this picture at my house of a newspaper I had on the counter in the kitchen

Line Perpendicular to a Plane

This is an image of a sailboat that represents a line, drawn in red, perpendicular to a plane, drawn in yellow. The mast of the boat is hitting the floor of the ship at a 90° angle creating two adjacent right angles on either side of the mass. Sailboats are used for travel, racing, and leisure. Sailors use sailboats, but so do many vacationers and adventure seekers. 

I discovered this image online at http://intermath.coe.uga.edu/dictnary/everyday.asp?termid=193

Three or More Coplanar Parallel Lines

This is a picture of a keyboard which contains more than 3 coplanar parallel lines (five are highlighted in magenta). These lines between the keys all lie on the same plane, they all have the same slope, but since they are a certain distance apart they will never intersect. The lines could be extended as far as needed and they still would not intersect. This picture is one I took of my MacBook keyboard in my house. Keyboards are used to type with computers, both laptop and desktop, along with tablets. Keyboards play a big role in professions such as graphic designer, cyber security technician, and writer. 

Non-Congruent Alternate Interior Angles

This is an image of bridge trusses that contain non-congruent alternate interior angles. The angles are drawn in red, the transversal line is in green, and the two lines are in yellow and magenta. The two  trusses are cut by another, this forms two angles inside the magenta and yellow lines and on opposite sides of the transversal that are not congruent with one another. Bridge trusses are used as support beams on bridges. They are used by thousands of commuters as they cross bridges. 

I found this image online at this website http://cte.unt.edu/content/files/_STEM/STEM_curr/EngMath/05CapstoneFinalChallenge/05FinalDesignChallenge.pptx

Vertical Angles

This is a pivot leg attached to a tray table. It contains two pairs of vertical angles (one has been outlined in red, and the other in green). It forms these angles since the angle at which the table opens is the same as the angle at which the legs open because vertical angles are congruent. Pivot legs can be found on objects of expandable furniture such a tables and chairs. It makes these tables and chairs easier to fold and store. I found this pivot leg on a tray table in my house's basement. Directors and actors have been known to stereotypically sit in chairs with pivot legs. These legs are frequently used for big events such as weddings or parties as they can be easily set up then taken down.