Quadrilateral
a closed shape with 4 sides
A quadrilateral is a geometrical figure that consists of four straight sides and four angles. The sum of the interior angles of a quadrilateral is always equal to 360 degrees. Some examples of quadrilaterals include rectangles, squares, parallelograms, rhombuses, trapezoids, and kites.
Each of these types of quadrilaterals has its unique properties.
1) Rectangle: A rectangle is a quadrilateral with four right angles. The opposite sides of a rectangle are parallel, and all sides are congruent (equal in length).
2) Square: A square is a quadrilateral with four congruent sides and four right angles. The diagonal lines bisect each other at right angles.
3) Parallelogram: A parallelogram is a quadrilateral with opposite sides that are parallel and congruent. The opposite angles are also congruent.
4) Rhombus: A rhombus is a quadrilateral with four congruent sides. The opposite angles are congruent, and the diagonals bisect each other at right angles.
5) Trapezoid: A trapezoid is a quadrilateral with one pair of opposite sides parallel. The other pair of opposite sides is not parallel, and the angles are not right angles.
6) Kite: A kite is a quadrilateral with two pairs of adjacent sides that are congruent. It has one pair of opposite angles are congruent, and one diagonal line bisects another at right angles.
In conclusion, understanding the properties of quadrilaterals are essential for solving many geometrical problems.
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