Topics
Basic Concepts in Geometry
Angles
 Concept of Angle  Arms, Vertex, Interior and Exterior Region
 Types of Angles Acute, Obtuse, Right, Straight, Reflex, Complete and Zero Angle.
 Introduction to Practical Geometry
 Constructing a Bisector of an Angle
 Constructing a Bisector of an Angle
 Constructing a Copy of an Angle of Unknown Measure
 Angles of Special Measures  30°, 45°, 60°, 90°, and 120°
Integers
Operations on Fractions
 Concept of Fractions
 Fraction on the Number Line
 Types of Fraction
 Concept of Proper Fractions.
 Improper Fraction and Mixed Fraction
 Concept for Equivalent Fractions
 Like and Unlike Fraction
 Addition of Fraction
 Subtraction of Fraction
 Multiplication of a Fraction by a Fraction
 Concept for Reciprocal of a Fraction
 Division of Fractions
Decimal Fractions
 Concept of Decimal Numbers
 Place Value in the Context of Decimal Fraction.
 Concept of Tenths, Hundredths and Thousandths in Decimal
 Interconversion of Fraction and Decimal
 Representing Decimals on the Number Line
 Addition of Decimal Numbers
 Subtraction of Decimals Fraction
 Multiplication of Decimal Numbers
 Division of a Decimal Number by a Whole Number
 Division of a Decimal Number by Another Decimal Number
Bar Graphs
Symmetry
Divisibility
HCFLCM
Equations
Ratio and Proportion
Percentage
Profit –Loss
Banks and Simple Interest
Triangles and Their Properties
Quadrilaterals
Geometrical Constructions
Three Dimensional Shapes
definition
Plane: Plane is a flat surface on which a straight line joining any two points on it would wholly lie.
notes
Plane:

In mathematics, a flat surface is called a plane.

Each flat surface is a part of an infinite surface.
 Plane is a flat surface on which a straight line joining any two points on it would wholly lie.

Even though we draw a suitably small figure of the plane, it actually extends infinitely on all sides. Arrows are drawn to show that the plane extends infinitely in all directions. However, these arrows are often omitted for the sake of convenience.

The 2dimensional shapes or objects in geometry are flat plane figures that have two dimensions – length and width. Twodimensional or 2D shapes do not have any thickness and can be measured in only two faces.
A plane figure can be made of straight lines, curved lines, or both straight and curved lines. The circle, the square, the rectangle, the quadrilateral and the triangle are examples of plane figures.