Question 1169219
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For  ALL  QUESTIONS  relevant to this configuration,  learn from the lesson


&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Angles/Parallel-lines.lesson>Parallel lines</A>


in this site.



Also, &nbsp;for all questions related to &nbsp;Geometry, &nbsp;you have this free of charge online textbook 

&nbsp;&nbsp;&nbsp;&nbsp;<A HREF=https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson>GEOMETRY - YOUR ONLINE TEXTBOOK</A> 

in this site.


The referred lesson is the part of this online textbook under the topic 
"<U>Basics of angles. Supplementary, complementary angles. Vertical angles. Parallel lines</U>".


Save the link to this online textbook together with its description


Free of charge online textbook in GEOMETRY
https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson


to your archive and use it when it is needed.