A, H, M, O, U, V, W, T, Y are some of the alphabets that can be divided vertically in symmetry. The mirror image of the other half of the shape can be seen in a vertical or straight standing position. Two types of lines of symmetry areĪ vertical line of symmetry refers to one which runs down an image or figure and divides into two identical halves. The line or axes may be any combination of Vertical, Horizontal, and Diagonal. Line of symmetry are two types:īasically, the line of symmetry is of two types. Hence, in such cases, line symmetry is not applicable. Such shapes are termed asymmetrical shapes. There are many shapes that are irregular and cannot be divided into equal parts.
Reflection symmetry sometimes called line symmetry or Mirror symmetry. Another name of line symmetry is “Reflection symmetry”, one half is the reflection of the other half. Line of symmetry means, it is the line that passes through the center of the object or any shape and it is considered as the imaginary or axis line of the object. You are already acquainted with the term symmetry which is a balanced and proportionate similarity found in two halves of an object, one – half is the mirror image of the other half. The two objects are claimed to be symmetrical if they have an identical size and shape with one object having a different orientation from the first. The word “symmetry” comes from a Greek word that implies measuring together. Suppose you can fold any picture, in it half you see both sides match, it is called Symmetrical. In mirror reflection, the orientation of the figure changes into left-right orientation as shown in figure.Symmetry can be split into two mirror-image halves.When the half part of a figure becomes same as its mirror image, we call the line along with mirror as the line of symmetry. We can also find the line of symmetry of a figure by putting a mirror.There are three lines of symmetry for an equilateral triangle. Trace an equilateral triangle on a tracing paper and find its lines of symmetry by folding. Each angle of a regular pentagon is 108°.Ī figure bounded by six sides of equal length is called a regular hexagon. We have already discussed that a square is also a regular polygon because its all sides are of equal length and each of its angles is a right angle (of measure 90°) as in figure.Ī figure bounded by five sides of equal length is called a regular pentagon. Let us now discuss a method of finding lines of symmetry of a regular polygon.Ī triangle whose all sides are of same length and each of its angles measures 60°, is called an equilateral triangle shown in figure. For example, a square is a regular quadrilateral figure. A rhombus is symmetrical about each of its diagonals.Ī closed figure bounded by straight line segments of equal length is called a Regular Polygon.A square has 4 lines of symmetry, namely the diagonals and lines joining the mid-points of its opposite sides.An equilateral triangle is symmetrical about each one of the bisectors of its interior angles.
A circle is symmetrical about each one of its diameters.A semicircle has one line of symmetry, namely the perpendicular bisector of diameter PQ.A rectangle has two lines of symmetry, each one of which is the line joining the mid point of opposite sides.Then kite PQRS is symmetrical about diagonal PR. Let PQRS be a kite in which PQ = PS and QR = SR.If one half completely covers the other, we say that the line is the line of symmetry otherwise not. The concept of line symmetry is closely related to mirror reflection. All objects and all alphabets below figure have line symmetry. A figure has a line symmetry if there is a line about which the figure may be folded so that the two parts of the figure will coincide.