Topics
Roman Numerals
Number Work
Addition and Subtraction
Multiplication and Division
Fractions
Angles
Circles
Multiples and Factors
Decimal Fractions
- Decimal Fractions
- The Decimal Number System
- Concept of Tenths, Hundredths and Thousandths in Decimal
- Concept of Place Value
- Use of Decimal Fraction
- Writing Half, Quarter, Three-quarters and One and a Quarter in Decimal Form
- Addition of Decimal Fraction
- Subtraction of Decimal Fraction
- Decimals Used for Measurement
Measuring Time
Problems on Measurement
Perimeter and Area
Three Dimensional Objects and Nets
Pictographs
Patterns
Preparation for Algebra
Drawing a Circle with a Compass
Steps to Draw a Circle Using a Compass:
(1) A compass is used to draw a circle. It has a metal point on one arm and a pencil holder on the other. A suitably sized pencil is fixed to it.
(2) First, fix the pencil to the compass. Align the metal tip of the compass with the pencil point, as shown in the picture.
(3) Take a convenient distance between the pencil point and the metal tip.
(4) Take any point on a piece of paper. Hold the metal tip steady on the chosen point and turn the pencil point around it on the sheet of paper. The shape created by the pencil point will be a circle.
(5) To draw a circle of a given radius, a distance equal to the radius is kept between the pencil point and the metal tip of the compass. In the accompanying diagram, this distance is 3 cm. Therefore, the circle's radius drawn using this distance is 3 cm.