document.write( "Question 1038154: Use 2 methods to show triangle with vertices A (-6, 5), B (2, 1), C (-2, -6) is a right triangle.
\n" ); document.write( "*Analytic Geometry Question*
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Algebra.Com's Answer #652878 by Alan3354(69443)\"\" \"About 
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Use 2 methods to show triangle with vertices A (-6, 5), B (2, 1), C (-2, -6) is a right triangle.
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\n" ); document.write( "Method 1:
\n" ); document.write( "Find the slope of AB, BC and AC.
\n" ); document.write( "If any pair is perpendicular, it's a right triangle.
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\n" ); document.write( "Method 2:
\n" ); document.write( "Find the length of the 3 sides.
\n" ); document.write( "If c^2 = a^2 + b^2 it's a right triangle (c = longest side).
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