Proving that a Quadrilateral is a Parallelogram

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Proving that a Quadrilateral is a Parallelogram

• Geometry 7.0 Students prove and use theorems
  involving the properties of quadrilaterals.
• Geometry 12.0 Students find and use measures of
  sides and of interior angles of polygons to
  classify figures and solve problems.

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Find values of x and y for which ABCD must be a
parallelogram.
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Example 2
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Example 3
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Example 4
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Example 5
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