So all other quadrilaterals are irregular. A rectangle is a four-sided shape with four right angles and two pairs of parallel sides. The only regular (all sides equal and all angles equal) quadrilateral is a square. A rectangle with four sides of equal length is a square. The opposite sides of a rectangle are equal and parallel to each other. Some of the important properties of a rectangle are given below. A rectangle can have a wide range of properties. It can also be defined as: an equiangular quadrilateral, since equiangular means that all of its angles are equal (360/4 90) or a parallelogram containing a right angle. A rectangle is a closed figure which has four sides and the angle formed by adjacent sides is 90°. and that's it for the special quadrilaterals. In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. one of the diagonals bisects (cuts equally in half) the other. Also see the reference documentation for version 3.53 (quarterly channel), version 3.52 and version 3.51.The opposite sides of a square are parallel. The opposite sides of a square are equal 3. All 4 angles of a square are right angles. The opposite sides are parallel and equal. the diagonals, shown as dashed lines above, meet at Title: The properties of a Rectangle 1 The properties of a Rectangle 4 Right Angles 1.The KiteĮach pair is made of two equal-length sides that join up.
(the US and UK definitions are swapped over!)Īn Isosceles trapezoid, as shown above, has left and right sides of equal length that join to the base at equal angles. NOTE: Squares, Rectangles and Rhombuses are allĪ trapezoid (called a trapezium in the UK) has a pair of opposite sides parallel.Īnd a trapezium (called a trapezoid in the UK) is a quadrilateral with NO parallel sides: Also opposite anglesĪre equal (angles "A" are the same, and angles "B" The ParallelogramĪ parallelogram has opposite sides parallel and equal in length. In other words they "bisect" (cut in half) each other at right angles.Ī rhombus is sometimes called a rhomb or a diamond. The RhombusĪ rhombus is a four-sided shape where all sides have equal length (marked "s").Īlso opposite sides are parallel and opposite angles are equal.Īnother interesting thing is that the diagonals (dashed lines) meet in the middle at a right angle.
The SquareĪ square has equal sides (marked "s") and every angle is a right angle (90°)Ī square also fits the definition of a rectangle (all angles are 90°), and a rhombus (all sides are equal length). The little squares in each corner mean "right angle"Ī rectangle is a four-sided shape where every angle is a right angle (90°).Īlso opposite sides are parallel and of equal length. Let us look at each type in turn: The Rectangle Some types are also included in the definition of other types! For example a square, rhombus and rectangle are also parallelograms. There are special types of quadrilateral: They should add to 360° Types of Quadrilaterals Try drawing a quadrilateral, and measure the angles. interior angles that add to 360 degrees:.(Also see this on Interactive Quadrilaterals) Properties
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