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document.write( "Statements Reasons \r\n" );
document.write( "1. EG = FH 1. Given\r\n" );
document.write( "2. EG = EF + FG 2. [1] SEGMENT ADDITION POSTULATE\r\n" );
document.write( "3. FH = FG + GH 3. Segment Addition \r\n" );
document.write( "4. EF + FG = FG + GH 4. [2] ADDITION PROPERTY OF EQUALITY\r\n" );
document.write( "5. EF = GH 5. Subtraction Property of Equality\r\n" );
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document.write( "Your reason for 4 is wrong. \r\n" );
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document.write( "The left side of statement 4, EF + FG, is equal to EG (from statement 2).\r\n" );
document.write( "The right side of statement 4, FG + GH, is equal to FH (from statement 3).\r\n" );
document.write( "EG and FH are equal things (from statement 1).\r\n" );
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document.write( "So EF + FG and FG + GH, respectively, are equal to equal things EG and FH, respectively.\r\n" );
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document.write( "So the postulate to give for 4 is\r\n" );
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document.write( "magnitudes equal to equal magnitudes are equal to each other\r\n" );
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document.write( "Justification:\r\n" );
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document.write( "https://archive.org/stream/planegeometry00duregoog/planegeometry00duregoog_djvu.txt\r\n" );
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document.write( "https://books.google.com/books?id=-i4AAAAAYAAJ&pg=PA26&lpg=PA26&dq=%22magnitudes+equal+to+equal+magnitudes+are+equal+to+each+other%22&source=bl&ots=b9rctac0iC&sig=ACfU3U0rvS7BnM8FWVV7vgt7-BbN_0dFGw&hl=en&sa=X&ved=2ahUKEwion67hqpb0AhUMTDABHdXMC6UQ6AF6BAgDEAM#v=onepage&q=%22magnitudes%20equal%20to%20equal%20magnitudes%20are%20equal%20to%20each%20other%22&f=false\r\n" );
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document.write( "Edwin
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