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CHAPTER AT A GLANCE
Area
•Unit: Mensuration
•Board weightage: Areas of a triangle, parallelogram, rhombus, trapezium and polygons, paths around rectangles and proofs by dissection give regular 2-mark, 3-mark and 4-mark questions (please check the latest sample paper)
•Key ideas from the textbook: area by counting unit squares, perimeter is not a measure of area, area of a triangle, medians and triangles between parallel lines, dissection of a parallelogram, rhombus and trapezium formulas, area of polygons using triangles, Śulba-Sūtra problems
•Most scoring part: writing the formula, substituting with units (square centimetres), simplifying and proving the formulas by dissection
•Time to revise: about 60 minutes
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