Skip Navigation Links
     
   
 Amsco Integrated Algebra I: Angles and Parallel Lines
This is a free lesson from our course in Amsco's Integrated Algebra
 
   
This lesson explains about parallel lines and interior, exterior, alternate interior and exterior, and corresponding angles. Two or more lines are called parallel lines if and only if the lines lie in the same plane but do not intersect. The symbol used for parallel lines to each other is ||. E.g. Line AB is parallel to CD is represented by AB || CD. When two lines are parallel, they have no points in common. A transversal is a line that intersects two or more lines (in the same plane). When lines intersect, angles are formed in several locations and names of certain angles describe ‘where’ the angles are located in relation to the lines. These names describe angles regardless of the lines being parallel or not parallel.
(More text below video...)
<h2> Angles and Parallel Lines</h2> <p> Parallel Lines, Math,angles,interior angle,exterior angle,corresponding angle,alternate interior,alternate exterior,traversal,alternate angles</p> <p> explains about parallel lines and interior, exterior, alternate interior and exterior, and corresponding angles.</p>
People who saw this lesson also found the following lessons useful:
Points, Lines, and Planes
Quadrilaterals
Surface Areas of Solids

(Continued from above) When two lines are cut by a third line i.e. traversal, two set of angles, each containing four angles, are formed. Such angles are: interior angles, exterior angles, alternate interior angles, alternate exterior angles, interior angles on the same side of the transversal, corresponding angles.
Note: the word interior means between the lines, the word exterior means outside the lines and the word alternate means ‘alternating sides’ of the transversal. There are other angle relationships also occurring when working with parallel lines. E.g. vertical angles, which are always equal (whether you have parallel lines or not), and are congruent.
Remember it!
Alternate Interior Angles and Parallel Lines: statement without proof- If two parallel lines are cut by a transversal, then the alternate interior angles that are formed have equal measures, i.e. they are congruent.
Corresponding Angles and Parallel Lines: theorem- If two parallel lines are cut by a transversal, then the corresponding angles formed have equal measures, that is, they are congruent. Alternate Exterior Angles and Parallel Lines: theorem- If two parallel lines are cut by a transversal, then the alternate exterior angles formed have equal measures, that is, they are congruent. Interior Angles on the Same Side of the Transversal: theorem- If two parallel lines are cut by a transversal, then the sum of the measures of the interior angles on the same side of the transversal is 180°.
The video above will explain about angles and parallel lines in detail with the help of figures and examples.

 
   

As many of you know, Winpossible's online courses use a unique teaching method where an instructor explains the concepts in any given area to you in his/her own voice and handwriting, just like you see your teacher explain things to you on a blackboard in your classroom. This particular lesson includes the teacher's instruction, practice questions as well as end-of-lesson quizzes for practice. As we mentioned above, you can enroll in our online course in Trigonometry by clicking here.

The format of Winpossible's online courses is also very suitable for teachers who are using an interactive whiteboard such as Smartboard on Promethean in their classrooms, because the course lessons can be easily displayed on such interactive whiteboards. Volume pricing is available for schools interested in our online courses. For more information, please contact us at educators@winpossible.com.

 
       
     
 Copyright © Winpossible, 2010 - 2011
Best viewed in 1024x768 & IE 5.0 or later version