Rhombus
Kite A kite is a four-sided shape with two short equal sides next to each other, and two long equal sides next to each other. It has one line of symmetry, along the longest diagonal-to find this line, imagine folding the kite in half lengthways. A rectangle is a four-sided shape where all the angles are 90 degrees. A rectangle has two lines of symmetry. Trapezium A trapezium is a four-sided shape where one pair of opposite sides is parallel and unequal. When the other sides are not parallel but are the same length, the shape is called an isosceles trapezium. Polygons are classified and described by the number of sides, the kind of angles, and whether any of the sides are the same length (or congruent). Many polygons have special names. This figure shows the most common polygons. Notice that we identified a 4-sided polygon as a quadrilateral. More commonly, you'd call this shape a rectangle, but a rectangle is only one kind of quadrilateral. A rectangle is a special quadrilateral where opposite sides are congruent -- that is, the same length -- and each angle is a right angle.  show equal sides. A square has equal sides and every angle is a right angle (90°). Also opposite sides are parallel. A square also fits the definition of a rectangle (all angles are 90°), and a rhombus (all sides are equal length). Quadrilaterals. Quadrilateral just means four sides. (quad means four, lateral means side). A Quadrilateral has four-sides, it is 2-dimensional (a flat shape), closed (the lines join up), and has straight sides. In Euclidean plane geometry, a quadrilateral is a polygon with four edges (or sides) and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon (5-sided), hexagon (6-sided) and so on. 1 Rectangle: all four angles are right angles. 2  An equivalent condition is that the diagonals bisect each other and are equal in length. 3  Informally: a box or oblong (including a square). 4  Square (regular quadrilateral): all four sides are of equal length (equilateral), and Definition of a Polygon. A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons. The name tells you how many sides the shape has. For example, a triangle has three sides, and a quadrilateral has four sides. A polygon is defined as a 2-dimensional shape with straight sides. Regular polygons have sides and angles that are all the same. While you can find the measurements of the exterior and interior angles of regular polygons, you can't with polygons that aren't regular. In geometry, we learn about Quadrilaterals. What is a Quadrilateral is the question which arises when we read this word. Let us break the word into two parts, Quadri-lateral, Quadri means four and lateral means straight sides. Quadrilateral put together means four sided figure or polygon. Next question that arises in our mind is What shape is a Quadrilateral or what shapes are Quadrilaterals, a four sided figure or polygon can be a rectangle or a square or a rhombus, we have different four sided shapes. • Rhombus: A Rhombus is a four sided figure in which all sides are of equal length. Opposite sides are parallel and opposite sides are equal. One more interesting property of a rhombus is that the diagonals of a rhombus bisect each other at right angles. Next question that arises in our mind is What shape is a Quadrilateral or what shapes are Quadrilaterals, a four sided figure or polygon can be a rectangle or a square or a rhombus, we have different four sided shapes. A rhombus is a four-sided shape where none of the angles are 90 degrees, opposite sides are parallel and all the sides are the same length. A rhombus has two lines of symmetry. A parallelogram is a four-sided shape where the opposite sides are parallel and the same length. A rectangle has two lines of symmetry. Trapezium A trapezium is a four-sided shape where one pair of opposite sides is parallel and unequal. When the other sides are not parallel but are the same length, the shape is called an isosceles trapezium. The Rhombus. A rhombus is a four-sided shape where all sides have equal length. Also opposite sides are parallel and opposite angles are equal. Another interesting thing is that the diagonals (dashed lines in second figure) meet in the middle at a right angle. In other words they bisect (cut in half) each other at right angles. Quadrilaterals. Quadrilateral just means four sides. (quad means four, lateral means side). A Quadrilateral has four-sides, it is 2-dimensional (a flat shape), closed (the lines join up), and has straight sides.
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what is the name of a four sided shape