document.write( "Question 797393: ABCD is a square, prove that AC=BD by using a 2 column proof \n" ); document.write( "

Algebra.Com's Answer #481772 by solver91311(24713) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "ABCD is square: Given. AB = BC = CD = AD : defn square. Construct AC and BD : Euclid's Postulate 3. Angle ABC is right : defn square. Angle DAB is right : defn square. Triangle ABC congruent triangle DAB : SAS. AC congruent BD : CPCT. mAC = mBD : defn congruent. Q.E.D. \r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "Egw to Beta kai to Sigma
\n" ); document.write( "My calculator said it, I believe it, that settles it
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