document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=818571>Question 818571</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use indirect reasoning to show that there is only one right angle in a right triangle. </SPAN>\n" );
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document.write( " there is only one right angle in a right triangle because, by definition, all three angles in a triangle MUST add up to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=180 ALIGN=MIDDLE  ALT=\"180\"   DISABLED_style= \"max-width:90%; height:auto;\" > degrees\r<BR>\n" );
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document.write( "if you have two right angles, their sum is already <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=180 ALIGN=MIDDLE  ALT=\"180\"   DISABLED_style= \"max-width:90%; height:auto;\" > degrees; so, there will be no way to have third angle in the shape and you'd never get a triangle out of that\r<BR>\n" );
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document.write( "having two right angles would give you two parallel lines perpendicular to a third; so, you'd never get a triangle out of that either </SPAN>\n" );
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