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[Member (365WT)]answers [Chinese ]Time :2018-11-20
In the same two-dimensional plane, a closed pattern consisting of two sets of parallel line segments is called a parallelogram. Parallelograms are generally named after the graphic name plus four vertices. Note: When using a letter to indicate a quad, be sure to note each vertex in a clockwise or counterclockwise direction.


    The opposite sides are parallel and equal and easily deformed


    Plane graphic

    Nature 1

    The two groups are equal to each other

    Nature 2

    The diagonals of the two groups are equal

    Nature 3

    Diagonal lines are equally divided

    Nature 4

    The opposite sides of the two groups are parallel to each other

    Inner angle and


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