document.write( "Question 499186: Which of the following conditions cannot be used for checking that two triangle are congruent?
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document.write( "(1) two corresponding angles and corresponding sides are equal
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document.write( "(2) two corresponding sides and the corresponding included angles are equal
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document.write( "(3) three corresponding angles are equal
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document.write( "(4) three corresponding sides are equal \n" );
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Algebra.Com's Answer #337452 by oberobic(2304)![]() ![]() ![]() You can put this solution on YOUR website! Use the process of elimination. \n" ); document.write( ". \n" ); document.write( "Which of the following conditions cannot be used for checking that two triangle are congruent? \n" ); document.write( "(1) two corresponding angles and corresponding sides are equal \n" ); document.write( "(2) two corresponding sides and the corresponding included angles are equal \n" ); document.write( "(3) three corresponding angles are equal \n" ); document.write( "(4) three corresponding sides are equal \n" ); document.write( ". \n" ); document.write( "(1) Clearly this will work because with 2 angles and 2 sides, there is no freedom for the third side. The third angle has to be 180 - sum of the 2 sides. The third side has to be fixed. \n" ); document.write( ". \n" ); document.write( "(2) This will work, too. The third angle is defined by knowing the two angles. The third side of the triangle is defined precisely and has not freedom to vary. \n" ); document.write( ". \n" ); document.write( "(3) This will not work. The triangles will be similar if all three angles are equal. But one could be microscopic and the other could be the drawn on a football field. \n" ); document.write( ". \n" ); document.write( "(4) This works. If the sides are all the same length, then the angles will be the same. \n" ); document.write( ". \n" ); document.write( "Question: Which will not work? (3) will not work. \n" ); document.write( " |