Integers Exercise 6.3 1). Find (a) 35 – (20) (b) 72 – (90) (c) (– 15) – (– 18) (d) (–20) – (13) (e) 23 – (– 12) (f) (–32) – (– 40) Answer: (a) 35 – (20) 35 – (20) = 35 – 20 = 15 (b) 72 …
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Integers Exercise 6.2 1). Using the number line write the integer which is: (a) 3 more than 5 Ans: 8. (b) 5 more than –5 Ans: 0. (c) 6 less than 2 Ans: -4. (d) 3 less than –2 Ans: -5. 2). Use number line and add the following integers: (a) 9 + (– 6) Ans: 9 + …
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Understanding Elementary Shapes Exercise 5.7 Questions with (*) sign are open-ended questions. 1). Say True or False. (a). Each angle of a rectangle is a right angle. (b). The opposite sides of a rectangle are equal in length. (c). The diagonals of a square are perpendicular to one another. (d). All the sides of a …
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Understanding Elementary Shapes Exercise 5.6 1). Name the types of following triangles: (a). Triangles with lengths of sides 7 cm, 8 cm and 9 cm. (b) ∆ABC with AB = 8.7 cm, AC = 7 cm and BC = 6 cm. (c). ∆PQR such that PQ = QR = PR = 5 cm. (d). ∆DEF …
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Understanding Elementary Shapes Exercise 5.1 Questions with (*) sign are open-ended questions. 1). What is the disadvantage in comparing line segments by mere observation? The disadvantage in comparing line segments by mere observation is that there may be possible errors in viewing. 2). Why is it better to use a divider than …
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Basic Geometrical Ideas Exercise 4.6 Examples for Practice 1). From the figure, identify: (a) the centre of the circle O is the centre of the circle. (b) three radii Radius OA, OB, OC (c) a diameter AC is the diameter. (d) a chord ED is …
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Basic Geometrical Ideas Exercise 4.1 1). Use the figure to name a). Five points b). A line c). Four rays d). Five line segments Answer: a). Five points B, O, E, D, C. b). A line There are many possible answers. For example line DE, line DB, line DO, line EB, etc. …
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