document.write( "Question 1108828: Three angles of an irregular octagon are 100,120,140degrees.The remaining angles are congruent.find the size of each of the remaining angles. \n" ); document.write( "

Algebra.Com's Answer #723830 by ikleyn(52847) $\"\"$ $\"About$

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document.write( "100 + 120 + 140 + (8-3)*x = (8-2)*180   degrees.   <<<---=== Each side is the sum of interior angles of the octagon.\r\n" );
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document.write( "Simplify and solve for x:\r\n" );
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document.write( "360 + 5x = 6*180,\r\n" );
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document.write( "5x = 6*180 - 360 = 720  ====>  x =  = 144.\r\n" );
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document.write( "Answer.  144 degrees.\r\n" );
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\n" ); document.write( "To see other similar solved problems, look into the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on supplementary and complementary angles\r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on angles of a triangle\r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on angles of a parallelogram\r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on angles of a quadrilateral\r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on angles of a polygon\r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on missed angle of a polygon\r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on angles of a regular polygon\r
\n" ); document.write( "\n" ); document.write( "in this site. \r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook on Geometry\r
\n" ); document.write( "\n" ); document.write( "    GEOMETRY - YOUR ONLINE TEXTBOOK \r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic \"Finding angles of triangles, parallelograms and rectangles\".\r
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\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in GEOMETRY
\n" ); document.write( "https://www.algebra.com/algebra/homework/Triangles/GEOMETRY-your-online-textbook.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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