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CHAPTER AT A GLANCE
Playing with Constructions
•Unit: Geometry (Constructions)
•Board weightage: Circle and compass, properties of rectangle and square, constructing squares and rectangles with given sides or a side and a diagonal, diagonals, and points equidistant from two points give regular 2-mark, 3-mark and 4-mark questions in school examinations (please check your school's latest sample paper)
•Key ideas from the textbook: circle as all points at a fixed distance, rough figure before construction, properties R1 and R2 of a rectangle and S1 and S2 of a square, naming, perpendiculars, locating a point by arcs, diagonals
•Most scoring part: writing the steps of a construction in order, with the radius or length used at every step, and checking the properties at the end
•Time to revise: about 60 minutes
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