document.write( "Question 43543: Use the concept of slope to determine if the given figure is a parallelogram or a rectangle? I think it is a parallelorgram but im not sure.\r
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Algebra.Com's Answer #28546 by Nate(3500) $\"\"$ $\"About$

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Points: (-1,-2) , (-3,1) , (0,3) , (2,0)
\n" ); document.write( "Slope(M) = (y2 - y1)/(x2 - x1) = (-2 - 1)/(-1 + 3) = -3/2
\n" ); document.write( "Slope(M) = (y2 - y1)/(x2 - x1) = (3 - 0)/(0 - 2) = -3/2
\n" ); document.write( "They are parallel.
\n" ); document.write( "Slope(M) = (y2 - y1)/(x2 - x1) = (3 - 1)/(0 + 3) = 2/3
\n" ); document.write( "Slope(M) = (y2 - y1)/(x2 - x1) = (0 + 2)/(2 + 1) = 2/3
\n" ); document.write( "They are parallel.
\n" ); document.write( "The opposite sides are parallel. That means that the shape is a square, so all the angles are 90 degrees.
\n" ); document.write( "A rectangle is a quadrilateral where all four of its angles are right angles.
\n" ); document.write( "A parallelogram is a quadrilateral that has two sets of opposite, parallel sides.
\n" ); document.write( "Isn't it both? \n" ); document.write( "

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