document.write( "Question 667233: Suppose the measure of an exterior of an equiangular triangle is (x + 15)°. What is the value of x?\r
\n" ); document.write( "\n" ); document.write( "x+15=120
\n" ); document.write( " -15 -15\r
\n" ); document.write( "\n" ); document.write( "x=105\r
\n" ); document.write( "\n" ); document.write( "Because the 2 angles of a triangle equals the measure of an exterior angle.\r
\n" ); document.write( "\n" ); document.write( "My teacher says that x=105, I was just wondering If I am doing this and explaining it correctly as to why I missed it. \n" ); document.write( "

Algebra.Com's Answer #414913 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "Suppose the measure of an exterior of an equiangular triangle is (x + 15)°.    What is the value of x?
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document.write( "Measure of an Interior angle of an equiangular triangle is: 60°
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document.write( "The exterior angle (x+15)° is the supplement of the interior angle:
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document.write( " (x+15)° = 180° - 60° = 120°
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document.write( "   x+15°=120°
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document.write( "     x = 105°\r
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document.write( "Using Your method of solving:
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document.write( "Perhaps it was because of Your following statement did not say what you wanted it to say.
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document.write( "\"Because the 2 angles of a triangle equals the measure of an exterior angle\"\r
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document.write( "\n" );
document.write( "better stated would be something like this:
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document.write( "An measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles. \n" );
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