Class 8 Maths - ODISHA
Area
In this chapter, Class 8 students under the Board of Secondary Education (BSE) Odisha will learn how to calculate the area of various two-dimensional geometric figures. Building on previous knowledge of rectangles and squares, this chapter introduces the calculation of areas for parallelograms, triangles, trapeziums, rhombuses, and general quadrilaterals. Students also explore the concept of the area of a circle and circular paths (annulus). Understanding these concepts is essential for solving real-life measurement problems and scoring well in the Odisha BSE board examinations, where geometry and mensuration carry significant weight.
Start Learning FreeKey Concepts
Area of Parallelogram
The area of a parallelogram is the product of its base and the corresponding height (altitude).
Area of Triangle
The area of a triangle is half the product of its base and its height, which is derived directly from the parallelogram formula.
Area of Trapezium
The area of a trapezium is calculated as half the product of the sum of its parallel sides and the perpendicular distance between them.
Area of Rhombus
The area of a rhombus can be found using its diagonals, calculated as half the product of the lengths of its two diagonals.
Area of Circle
The area enclosed by a circle is calculated using the formula pi multiplied by the square of its radius.
Important Formulas
Board Exam Info
In the Odisha BSE Class 8 mathematics examination, the mensuration and area section typically carries around 8 to 12 marks. Questions usually include direct formula-based calculations, word problems involving composite shapes, and finding the area of paths running inside or outside rectangular fields.
Frequently Asked Questions
What is the difference between perimeter and area?
Perimeter is the total length of the outer boundary of a closed figure, while area is the total space enclosed inside that boundary.
Can a triangle and a parallelogram have the same area?
Yes, if a triangle and a parallelogram stand on the same base and between the same parallels, the area of the triangle is half the area of the parallelogram.
What value of pi should I use in calculations?
Unless specified otherwise in the question, you should use 22/7 or 3.14 for pi.
Learn Area with Your AI Tutor
10 different ways to study this chapter. Free for 3 chapters per day.
Lecture
Key Points
Interactive
Quiz
Flashcards