Archive for November, 2009

Lauren Wagner

November 17, 2009

There are not very many jobs where you would have to know the exact distance

from a point to a line. A job where you would use that is if you make cd’s.

This job would be very difficult trying to get the EXACT distance. They also

use this theorem a lot to make gaming programs.

There also are a number of 3D geometric construction techniques that require a coordinate system perpendicular to a line segment, some examples are:

  • Creating a disk given its center, radius and normal.

  • Forming a cylinder given its two end points and radii at each end.

  • Creating a plane coordinate system perpendicular to a line.

Spencer Elliott

November 12, 2009

Parallel and perpendicular lines play an important role in our lives. This is evident in the field of engineering and architecture. Parallelism and perpendicularity is applied in order to construct a building, which has a uniform structure and a strong foundation. It has to be perpendicular to the ground and its floors parallel to each other. Without this, the building will not be able to stand. Engineers would apply the principle of parallelism and perpendicularity and with the aid of modern measuring equipments, they will be able to calculate the dimensions of the building. This is the stepping tone of the engineer towards the successful construction of the building.

Kylie Wroot

November 12, 2009

Suppose you need to solve a crime mystery. You survey the crime scene, gather the facts, and write them down in your memo pad. To solve the crime, you take the known facts and, step by step, show who committed the crime. You conscientiously provide supporting evidence for each statement you make.


Amazingly, this is the same process you use to solve a proof.




Kylie Wroot:  period 5- 11-3-09

Emma Lee

November 12, 2009

There are many different jobs that involve using linear angles on a daily basis. Architects use them to measure walls, stairs, etc. Contractors use them for almost everything.  They use them to measur the angle and pitch of the roof so that they know how many shingles they will use.  Furniture builders use them to make sure everything is put together so it will work properly. The definition of a linear angle is a pair of adjacent angles formed by intersecting lines.


Emma Lee

Geometry Period 5

Lydia Lusk

November 12, 2009

Parking Lot Activities The activities in this section help students to understand the significance and detail needed to paint lines in a parking lot. To complete these activities, students need access to a parking lot with a common line intersecting several parking spaces. They will also need a protractor large enough to measure the angles created by the intersecting lines. It is preferable, but not essential, to find a parking lot where the lines do not all meet at right angles. This activity is geared to students who are in geometry (usually in 10th or 11th grade) and ready to learn about parallel lines, transversals, and the related angles. Some prior knowledge of basic geometry is required to perform this activity, including (but not limited to) the concepts of intersecting lines, congruent angles, angle measures, naming angles, and the use of protractors. Students should also know the different types of angles that are created by any transversal, including corresponding angles, alternate interior angles, alternate exterior angles, and consecutive interior angles (also called same side interior angles).