If a symmetrical figure gets divided by an axis in the figure into two parts which fall exactly on each other, its symmetry is called reflectional symmetry. Some figures have more than one axis of symmetry. This line is the axis of symmetry of the figure. Mark dots the line which makes two equal parts of the figure. Fold the paper so that their two parts fall exactly on each other. Write the English capital letters A, H, M in a large size on separate sheets of paper.
When dealing with mirror reflection, we have to take into account the left ↔ right changes in orientation. The line symmetry is closely related to mirror reflection. That is, a figure which does not change upon undergoing a reflection has reflectional symmetry. Reflection symmetry is symmetry with respect to reflection.
Line symmetry and mirror reflection are naturally related and linked to each other. The concept of line symmetry is closely related to mirror reflection.
Drawing Solids on a Flat Surface - Isometric Sketches. Drawing Solids on a Flat Surface - Oblique Sketches. Nets for Building 3-d Shapes - Cube, Cuboids, Cylinders, Cones, Pyramid, and Prism. Expressing Large Numbers in the Standard Form. Decimal Number System Using Exponents and Powers. Miscellaneous Examples Using the Laws of Exponents. Numbers with Exponent Zero, One, Negative Exponents. Dividing Powers with Different Base and Same Exponents. Multiplying Powers with Different Base and Same Exponents. Evaluation of Algebraic Expressions by Substituting a Value for the Variable. Types of Algebraic Expressions as Monomials, Binomials, Trinomials, and Polynomials. Terms, Factors and Coefficients of Expression. Generalising for Other Congruent Parts of Rectangles. Triangles as Parts of Rectangles and Square. Constructing a Right-angled Triangle When the Length of One Leg and Its Hypotenuse Are Given (RHS Criterion). Constructing a Triangle When the Measures of Two of Its Angles and the Length of the Side Included Between Them is Given. Constructing a Triangle When the Lengths of Two Sides and the Measure of the Angle Between Them Are Known. 
Constructing a Triangle When the Length of Its Three Sides Are Known (SSS Criterion). Construction of a Line Parallel to a Given Line, Through a Point Not on the Line. Rational Numbers Between Two Rational Numbers. Concept of Principal, Interest, Amount, and Simple Interest. Concepts of Cost Price, Selling Price, Total Cost Price, and Profit and Loss, Discount, Overhead Expenses and GST. Converting Fractional Numbers to Percentage. Exceptional Criteria for Congruence of Triangles. Right-angled Triangles and Pythagoras Property. Sum of the Lengths of Two Sides of a Triangle. Some Special Types of Triangles - Equilateral and Isosceles Triangles. Exterior Angle of a Triangle and Its Property. Classification of Triangles (On the Basis of Sides, and of Angles). Concept of Triangles - Sides, Angles, Vertices, Interior and Exterior of Triangle. Pairs of Lines - Transversal of Parallel Lines. Pairs of Lines - Angles Made by a Transversal. Concept of Angle - Arms, Vertex, Interior and Exterior Region. Applications of Simple Equations to Practical Situations. Concept of Representative Values - Average. Division of a Decimal Number by Another Decimal Number. Division of a Decimal Number by a Whole Number. Multiplication of Decimal Numbers by 10, 1. Multiplication of a Fraction by a Fraction. Multiplication of a Fraction by a Whole Number. Making Multiplication Easier of Integers. Distributive Property of Multiplication of Integers. Associative Property of Multiplication of Integers. Commutative Property of Multiplication of Integers. Closure Property of Multiplication of Integers. Product of Three Or More Negative Integers. 
Multiplication of Two Negative Integers.Multiplication of a Positive and a Negative Integers.Properties of Addition and Subtraction of Integers.Representation of Integers on the Number Line.
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