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      <title>Module 7 - Plane Geometry by Erin Martin</title>
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      <description>Erin Martin</description>
      <language>en-us</language>
      <pubDate>2017-03-17 02:43:36 UTC</pubDate>
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         <title>Vocabulary</title>
         <author>martine1405</author>
         <link>https://padlet.com/martine1405/hliohoejexp3/wish/160694770</link>
         <description><![CDATA[<div><strong>Vector</strong> - a quantity possessing both magnitude and direction, represented by an arrow the direction of which indicates the direction of the quantity and the length of which is proportional to the magnitude.<br><br><strong>magnitude </strong>- size; extent; dimensions<br><br><strong>additive inverse matrix</strong> - The matrix obtained by changing the sign of every matrix element. The additive inverse of matrix A is written –A. Note: The sum of a matrix and its additive inverse is the zero matrix.<br><br><strong>Multiplicative inverse matrix</strong>- When A is multiplied by A<sup>-1</sup> the result is the identity matrix I. Non-square matrices do not have inverses. <br><br><strong>determinant</strong> - In linear algebra, the determinant is a useful value that can be computed from the elements of a square matrix. used to find multi. inverse.</div>]]></description>
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         <pubDate>2017-03-17 02:45:42 UTC</pubDate>
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         <title>Multiplicative Inverse and determinate equation:</title>
         <author>martine1405</author>
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         <pubDate>2017-03-17 02:57:10 UTC</pubDate>
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         <title>Reflection Matrices</title>
         <author>martine1405</author>
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         <description><![CDATA[<div>used when trying to reflect matrices.</div>]]></description>
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         <pubDate>2017-03-17 02:59:17 UTC</pubDate>
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         <title>Rotation Martices</title>
         <author>martine1405</author>
         <link>https://padlet.com/martine1405/hliohoejexp3/wish/160696408</link>
         <description><![CDATA[<div>used when rotating polygons about origin.</div>]]></description>
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         <pubDate>2017-03-17 03:03:20 UTC</pubDate>
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         <title>Adding vectors</title>
         <author>martine1405</author>
         <link>https://padlet.com/martine1405/hliohoejexp3/wish/160698338</link>
         <description><![CDATA[<div>same process with subtraction, except <strong>vector a + vector b</strong> is now <strong>vector a + vector -b</strong></div>]]></description>
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         <pubDate>2017-03-17 03:26:26 UTC</pubDate>
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         <title>example problem : subtracting vectors</title>
         <author>martine1405</author>
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         <pubDate>2017-03-17 03:34:07 UTC</pubDate>
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      <item>
         <title>Oh MY isn&#39;t this interesting??</title>
         <author>martine1405</author>
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         <description><![CDATA[]]></description>
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         <pubDate>2017-03-17 03:40:47 UTC</pubDate>
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         <title></title>
         <author>martine1405</author>
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         <description><![CDATA[<div><br><br><br><br><br><br><br><br><br><br><br><br></div>]]></description>
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         <pubDate>2017-03-17 03:42:12 UTC</pubDate>
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