Chapter 14 Practical Geometry Ex 14.1
Chapter 14 Practical Geometry Ex 14.1 Question 1. Draw a circle of radius 3.2 cm. Solution: Step I : Mark a point O as a centre. Step II: Open the compass up to the given radius 3.2 cm. Step III : Put the needle of the compass at the centre O. Step IV : Holding […]
Chapter 13 Symmetry
Chapter 13 Symmetry Very Short Answer Type Question 1. Write four such English letters which have no line of symmetry. Solution: The 4 English letters having no line of symmetry are: P, F, G and Z. Question 2. Write 5 such English letters which have horizontal line of symmetry. Solution: The required letters are: E, […]
Chapter 13 Symmetry Ex 13.3
Chapter 13 Symmetry Ex 13.3 Question 1. Find the number of lines of symmetry in each of the following shapes. How will you check your answer? Solution: (a) The given figure has 4 lines of symmetry. (b) The given figure has only one line of symmetry. (c) The given figure has two line of symmetry. […]
Chapter 13 Symmetry Ex 13.2
Chapter 13 Symmetry Ex 13.2 Question 1. Find the number of lines of symmetry for each of the following shapes. Solution: (a) Here, there are four symmetric lines l, m, n and o. (b) In this figure, there are four symmetric lines p, q, r and s. (c) In this shape, u, v , w […]
Chapter 13 Symmetry Ex 13.1
Chapter 13 Symmetry Ex 13.1 Question 1. List any four symmetrical objects from your home or school. Solution: The following objects can be symmetrical: (a) Notebook (b) Dinning table (c) A blackboard (d) Wall clock (e) A pair of scissors Question 2. For the given figure, which one is the mirror line, l1 or l2? Solution: […]
Chapter 12 Ratios and Proportions Ex 12.3
Chapter 12 Ratios and Proportions Ex 12.3
Chapter 12 Ratios and Proportions Ex 12.2
Chapter 12 Ratios and Proportions Ex 12.2 Question 1. Determine if the following are in proportion, (a) 15, 45, 40, 120 (b) 33, 121, 9, 96 (c) 24, 28, 36, 48 (d) 32, 48, 70, 210 (e) 4, 6, 8, 12 (f) 33, 44, 75, 100 Solution: ∴ 15 : 45 :: 40 : 120 […]
Chapter 12 Ratios and Proportions Ex 12.1
Chapter 12 Ratios and Proportions Ex 12.1 Question 1. There are 20 girls and 15 boys in a class. (a) What is the ratio of the number of girls to the number of boys? (b) What is the ratio of the number of girls to the number of students in the class? Solution: (a) Number […]
Chapter 12 Ratio and Proportion
Chapter 12 Ratio and Proportion Very Short Answer Type Question 1. Find the ratio of 75 cm to 1.5 m. Solution: The given numbers are not in the same units. So, converting them into same units. 1.5 m = 1.5 x 100 cm = 150 cm [∵ 1 m = 100 cm] ∴ The required […]
Chapter 11 Algebra
Chapter 11 Algebra Very Short Answer Type Question 1. Six less than a number equals to two. What is the number? Solution: Let the number be ‘x’. According to condition, we have x – 6 = 2 By inspections, we have 8 – 6 = 2 ∴ x = 8 Thus, the required number is […]