Chapter 4 Basic Geometrical Ideas Ex 4.5
Chapter 4 Basic Geometrical Ideas Ex 4.5 Question 1. Draw a rough sketch of a quadrilateral PQRS. Draw its diagonals. Name them. Is the meeting point of the diagonals in the interior or exterior of the quadrilateral? Solution: (i) We have a quadrilateral PQRS. (ii) PR and QS are its two diagonals. (iii) O is […]
Chapter 4 Basic Geometrical Ideas Ex 4.4
Chapter 4 Basic Geometrical Ideas Ex 4.4 Question 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? Solution: Triangle ABC is the given triangle. P is in the interior of […]
Basic Geometrical Ideas Ex 4.3
Chapter 4 Basic Geometrical Ideas Ex 4.3 Question 1. Name the angles in the given figure. Solution: The angles are: (i) ∠A or ∠DAB (ii) ∠B or ∠CBA (iii) ∠C or ∠DCB (iv) ∠D or ∠ADC. Question 2. In the given diagram, name the point(s): (a) In the interior of ∠DOE (b) In the exterior […]
Chapter 4 Basic Geometrical Ideas Ex 4.2
Chapter 4 Basic Geometrical Ideas Ex 4.2 Question 1. Classify the following curves as (i) open or (ii) closed. Solution: (a) Open curve (b) Closed curve (c) Open curve (d) Closed curve Question 2. Draw rough diagrams to illustrate the following: (a) Open curve (b) Closed curve Solution: Question 3. Draw any polygon and shade […]
Chapter 4 Basic Geometrical Ideas Ex 4.1
Chapter 4 Basic Geometrical Ideas Ex 4.1 Question 1. Use the figure to name: (a) Five points (b) A line (c) Four rays (d) Five line segments Solution: (a) Five points are: O, B, C, E and D Question 2. Name the line given in all possible (twelve) ways, choosing only two letters at a […]
Chapter 3 Playing With Numbers
Chapter 3 Playing With Numbers Very Short Answer Type Question 1. What is the sum of any two (a) even numbers (b) odd numbers? Solution: (a) The sum of any two even numbers is even. Example: 4 (even) + 6 (even) = 10 (even) (b) The sum of any two odd numbers is even. Example: […]
Chapter 3 Playing With Numbers Ex. 3.7
Chapter 3 Playing With Numbers Ex. 3.7 Question 1. Renu purchases two bags of fertiliser of weights 75 kg and 69 kg. Find the maximum value of weight which can measure the weight of the fertiliser exact number of times. Solution: Maximum value of weight which can measure the given weight exact number of time […]
Chapter 3 Playing With Numbers Ex. 3.6
Chapter 3 Playing With Numbers Ex. 3.6 Question 1. Find the HCF of the following numbers: (a) 18, 48 (b) 30, 42 (c) 18, 60 (d) 27,63 (e) 36,84 (f) 34, 102 (g) 70, 105, 175 (h) 91, 112, 49 (i) 18, 54, 81 (j) 12, 45, 75 Solution: Question 2. What is the HCF […]
Chapter 3 Playing With Numbers Ex. 3.5
Chapter 3 Playing With Numbers Ex. 3.5 Question 1. Which of the following statements are true? (a) If a number is divisible by 3, it must be divisible by 9. (b) If a number is divisible by 9, it must be divisible by 3. (c) A number is divisible by 18, if it is divisible […]
Chapter 3 Playing With Numbers Ex. 3.4
Chapter 3 Playing With Numbers Ex. 3.4 Question 1. Find the common factors of: (a) 20 and 28 (b) 15 and 25 (c) 35 and 50 (d) 56 and 120 Solution: (a) Given numbers are : 20 and 28 Factors of 20 are 1, 2, 4, 5, 10, 20 Factors of 28 are 1, 2, […]