A POLYGONE is a many-sided shape. Sides and angles are the same. Quadrilateral has 4 sides and 4 angles.
Parallelogram has two pairs of parallel sides. Its parallel sides are equal. Its opposite angles are equal too.
Rhombus is parallelogram too. Its sides are all equal. Square has all equal sides and all equal angles too. Rectangle is a parallelogram which has all equal angles. Trapezoid has only two parallel sides.
The diagonals of a parallelogram are divided in half by the point of intersection.
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