Topics
Basic Concepts in Geometry
Angles
Integers
Operations on Fractions
Decimal Fractions
Bar Graphs
Symmetry
Divisibility
HCF-LCM
Equations
Ratio and Proportion
Percentage
Profit –Loss
Banks and Simple Interest
Triangles and Their Properties
Quadrilaterals
Geometrical Constructions
- Perpendicular Lines
- Drawing a Perpendicular to a Line at a Point on the Line
- Drawing a perpendicular to a line from a point outside the line
- The Perpendicular Bisector
- Drawing the perpendicular bisector of a segment using a compass.
- Carl Gauss’s Clever Trick
Three Dimensional Shapes
Concept of Opposite Numbers
Opposite numbers: Opposite numbers have the same distance from 0, but they are on the other side of the number lines. An integer is a number without a decimal or fractional form. This kind of number may be positive, negative, or 0. Opposite integers are considered negative or positive forms of a number.
The only integer that is its opposite is zero. It means the opposite of 0 is 0.
Properties of Opposite numbers:
1. Opposite numbers are at the same distance from zero but in opposite directions.
2. The sum of two opposite numbers is zero.
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