Chapter 5 Understanding Elementary Shapes Ex. 5.2
Chapter 5 Understanding Elementary Shapes Ex. 5.2 Question 1. What fraction of a clockwise revolution does the hour hand of a clock turn through, when it goes from (a) 3 to 9 (b) 4 to 7 (c) 7 to 10 (d) 12 to 9 (e) 1 to 10 (f) 6 to 3 Solution: Question 2. […]
Chapter 5 Understanding Elementary Shapes Ex 5.1
Chapter 5 Understanding Elementary Shapes Ex 5.1 Question 1. What is the disadvantage in comparing line segment by metre observation? Solution: Comparing the lengths of two line segments simply by ‘observation’ may not be accurate. So we use divider to compare the length of the given line segments. Question 2. Why is it better to […]
Chapter 4 Basic Geometrical Ideas
Chapter 4 Basic Geometrical Ideas Very Short Answer Type Question 1. Draw a rough sketch of: (a) open curve (b) closed curve Solution: Question 5. Question 6. In the given figure, name all the possible triangles. Solution: Possible triangles are: (i) ∆ABC (ii) ∆ABD (iii) ∆ABE (iv) ∆ACD (a) ∆ACE (vi) ∆ADE Question 7. Name […]
Chapter 4 Basic Geometrical Ideas Ex 4.6
Chapter 4 Basic Geometrical Ideas Ex 4.6 Question 1. From the figure, identify: (a) the centre of circle (b) three radii (c) a diameter (d) a chord (e) two points in the interior Question 2. (a) Is every diameter of a circle also a chord? (b) Is every chord of a circle also a diameter? […]
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: […]