Point SymmetryDate: 08/19/2001 at 02:24:35 From: tammy Subject: Geometry What exactly is point symmetry? How can one tell if point symmetry is present? Date: 08/19/2001 at 15:30:16 From: Doctor Sarah Subject: Re: geometry Hi Tammy - thanks for writing to Dr. Math. You can read about point symmetry and study some good diagrams at the New York State Regents Exam Prep Center: An Intuitive Notion of Point Symmetry http://regentsprep.org/Regents/math/symmetry/Psymmet.htm Point symmetry exists when a figure is built around a single point called the center of the figure. For every point in the figure, there is another point found directly opposite it on the other side of the center... A simple test to determine whether a figure has point symmetry is to turn it upside-down and see if it looks the same. A figure that has point symmetry is unchanged in appearance by a 180-degree rotation. - Doctor Sarah, The Math Forum http://mathforum.org/dr.math/ |
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