document.write( "Question 640848: Show that A(-1,-2),B(4,-2)and(4,3)are the vertices of a right-angled triangle \n" ); document.write( "
Algebra.Com's Answer #403439 by benni1013(206)\"\" \"About 
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Graph the points, count the number of units between the legs and if it agrees with the Pythagorean theorem it is a right triangle. \n" ); document.write( "
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