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
The Interior and the Exterior of a circle
Interior of a Circle: The region inside the boundary of the circle, including the centre, is called the interior of the circle.
Exterior of a Circle: The region outside the boundary of the circle is called the exterior of the circle.
In the picture alongside, K, L, M, and N are points on a circle with centre T.
The coloured area inside the circle in the picture is the circle's interior. P, Q, R, and T are points in the interior of the circle.
A, B, C, and D are points on the exterior of the circle.
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