Exercise 11.1 1. Construct an angle of 90° at the initial point of a given ray and justify the construction. Construction Procedure: To construct an angle 90°, follow the given steps: 1. Draw a ray OA 2….

Exercise 13.1 1. A plastic box 1.5 m long, 1.25 m wide and 65 cm deep, is to be made. It is to be open at the top. Ignoring the thickness of the plastic sheet, determine: (i)The…

Exercise 14.1  1. Give five examples of data that you can collect from your day-to-day life. Solution: Five examples from day-to-day life: 2. Classify the data in Q.1 above as primary or secondary data. Solution: Primary data:…

Exercise 15.1 1. In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary. Solution: According to the question, Total number…

Exercise 1.1 1. Using appropriate properties find. (i) -2/3 × 3/5 + 5/2 – 3/5 × 1/6 Solution: – -2/3 × 3/5 + 5/2 – 3/5 × 1/6 = -2/3 × 3/5– 3/5 × 1/6+ 5/2 =…

Exercise 2.1 Solve the following equations. 1. x – 2 = 7 Solution: – x – 2 = 7 x=7+2 x=9 2. y + 3 = 10 Solution: – y + 3 = 10 y = 10…

Exercise 3.1 1. Given here are some figures. Classify each of them on the basis of the following. Simple curve (b) Simple closed curve (c) Polygon (d) Convex polygon (e) Concave polygon Solution: – a) Simple curve:…

Exercise 4.1 1. Construct the following quadrilaterals. (i) Quadrilateral ABCD AB = 4.5 cm BC = 5.5 cm CD = 4 cm AD = 6 cm AC = 7 cm Solution: – The rough sketch of the…

Exercise 5.1 1. For which of these would you use a histogram to show the data? (a) The number of letters for different areas in a postman’s bag. (b) The height of competitors in an athletics meet….