opposite angles are congruent; and
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A polygon is a closed plane figure composed of at least three line segments that do not cross.
The student will describe and identify properties of quadrilaterals.
Describe the two-dimensional figures that result from slicing three-dimensional figures parallel to the base (e.g., as in plane sections of right rectangular prisms and right rectangular pyramids).
Identify regular polygons.
Identify the sum of the measures of the angles of a quadrilateral as 360°.