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 5.5 1). Which of the following are models for perpendicular lines: (a). The adjacent edges of a table top. (b). The lines of a railway track. (c). The line segments forming the letter ‘L’. (d). The letter V. Answers: (a). The adjacent edges of a table top. Perpendicular lines. (b). …
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Understanding Elementary Shapes Exercise 5.4 Questions with (*) sign are open-ended questions. 1). What is the measure of (i) a right angle? (ii) a straight angle? (i) the measure of a right angle is 900. (ii) the measure of a straight angle is 1800. 2). Say True or False: a). The measure of an acute …
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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 4.5 Examples for Practice 1). Draw a rough sketch of quadrilateral PQRS. Draw its diagonals. Name them. Is the meeting point of the diagonals in the interior or exterior of the quadrilateral? The meeting point of the diagonals is in the interior of the quadrilateral. 2). Draw a rough …
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Basic Geometrical Ideas Exercise 4.4 Examples for Practice 1). Draw a rough sketch of a triangle ABC. Mark a point P in its interior and a point Q in its exterior. Is the point A in its exterior or in its interior? Point A is neither in the exterior nor in the interior, …
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Playing with Numbers Exercise 3.7 1). Find the HCF of the following numbers: 1). Renu purchases two bags of fertilizer of weights 75 kg and 69 kg. Find the maximum value of weight which can measure the weight of the fertilizer exact number of times. 2). Three boys step off together from the same …
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Playing with Numbers Exercise 3.4 1). Find the common factors of : (a) 20 and 28 Factors of 20 = 1, 2, 4, 5, 10, 20 Factors of 28 = 1, 2, 4, 7, 14, 28 Common factors = 1, 2, 4 (b) 15 and 25 Factors of 15 = 1, 3, 5, 15 Factors …
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