document.write( "Question 190529: What is the given and the to prove of \"If one angle of a triangle is 90 degrees, then the other two add to 90 degrees\"? \n" ); document.write( "
Algebra.Com's Answer #142977 by jim_thompson5910(35256)\"\" \"About 
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Well, you could use the following property: the sum of the three angles of any triangle is 180 degrees.\r
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\n" ); document.write( "\n" ); document.write( "So let x, y, and z be the three angles of a triangle\r
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\n" ); document.write( "\n" ); document.write( "According to the given property, this means that \"x%2By%2Bz=180\"\r
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\n" ); document.write( "\n" ); document.write( "Since \" one angle of a triangle is 90 degrees\", this means that we'll let \"x=90\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%2By%2Bz=180\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"90%2By%2Bz=180\" Plug in \"x=90\"\r
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\n" ); document.write( "\n" ); document.write( "\"y%2Bz=180-90\" Subtract 90 from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"y%2Bz=90\" Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So this shows that the sum of the other two angles is 90 degrees.
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