Lines of symmetry in a regular Pentagon What is line of symmetry ? The line of symmetry is the imaginary line where we could fold the image and have both halves match exactly. If a given line splits a given figure into two identical halves, we say that the line has a line of symmetry […]

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Perimeter of a Square – Definition – Examples – Formula What is perimeter? Perimeter comes from the Greek words ‘Peri’ meaning surrounding or inclosing of a surface and ‘Meter’ meaning distance. So perimeter means total measurement of boundaries of a surface. Definition: The Perimeter of a square is the distance (total of length) covered by […]

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 Volume – Definition – Examples A shape’s volume is the measure of the amount of total 3- dimensional space inside it, like a ball, cube, cylinder or pyramid. or The measure of the capacity that an object holds is known as its volume. Volume is measured in cubic unit. The volume of a cube with sides […]

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Similar Polygons Two polygons are similar if they have same shape, but not the same size. Similar polygons are polygons, if their corresponding angles are congruent, and the measure of their corresponding sides are proportional. The ratio of length of their corresponding sides are all in a constant ratio, and their corresponding angles are equal. […]

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Compared different unit quantities 1.Length of a pencil is 15cm and its diameter is 5mm. What is the ratio of the length of pencil and diameter.        The length and diameter of the pencil are given in different units. The length of pencil in centimeter and the diameter    diameter of pencil in millimeter.         First […]

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 Congruent Figures In our daily life we see many congruent objects like as,  (i) Two 2 Rupees, 5 Rupees, or 10 Rupees coins. (ii) Two text books of mathematics of same class.  Two figures or objects are called congruent, when one object cover the other completely and exactly. This means that two books or coins […]

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 Rhombus – Definition – Properties Definition: A rhombus is a quadrilateral (closed shape, plane figure) with four straight sides that are equal length also opposite sides are parallel and opposite angles are equal. A rhombuses is a type of parallelogram. All rhombuses are parallelograms, but not all parallelograms are rhombuses.  All squares are rhombuses, but not all […]

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 Convex Polygons: Definition – Examples and Properties   All polygons is either convex or concave. A polygon will be convex or concave, it depends on the measure of their angles. If the measures of all interior angles is less 1800 than the polygon is convex, otherwise the polygon is concave.                 […]

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Concave Polygons: Definition – Examples & Properties   All polygons is either convex or concave. A polygon will be convex or concave, it depends on the measure of their angles. What is a Concave Polygon? A concave polygon have at least four sides, and concave polygon is just opposite of a convex polygon. If the measures […]

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