Class 9 Maths NCERT Solutions Chapter 14: Statistics Ex – 14.1 Question 1. Give five examples of data that you collect from your day-to-day life. Solution: Five examples of data that we can gather from our day-to-day life are (i) Number of students in our class. (ii) number of fans in our class. (iii) electricity […]
 Class 9 Maths NCERT Solutions Chapter 13: Surface Areas and Volumes Ex – 13.1 Question 1. A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thickness of the plastic sheet, determine (i) The area of the sheet required for
 Class 9 Maths NCERT Solutions Chapter 12: Constructions Ex – 12.1 Question 1. Construct an angle of 90° at the initial point of a given ray and justify the construction. Solution: Steps of construction Taking O as centre and some radius, draw an arc of a circle which intersects OA say at a point B.
 Class 9 Maths NCERT Solutions Chapter 11: Circles Ex – 11.1 Question 1. Fill in the blanks. (i) The centre of a circle lies in ___ of the circle. (exterior/interior) (ii) A point, whose distance from the centre of a circle is greater than its radius lies in ____ of the circle, (exterior/interior) (iii) The
 Class 9 Maths NCERT Solutions Chapter 10: Areas of Parallelograms and Triangles Ex – 10.1 Question 1. Which of the following figures lie on the same base and between the same parallels. In such a case, write the common base and the two parallels. Solution: In Fig. (i), APDC and trape∠ium ABCD Wes on the
Class 9 Maths NCERT Solutions Chapter 9: Quadrilaterals Ex – 9.1 Question 1. The angles of quadrilateral are in the ratio 3 : 5 : 9 : 13. Find all the angles of the quadrilateral. Solution: Given:Â the ratio of the angles of quadrilateral are 3 : 5 : 9 : 13. Let the angles
Class 9 Maths NCERT Solutions Chapter 7: Heron’s Formula Ex – 7.1 Question 1. A traffic signal board, indicating ‘SCHOOL AHEAD’, is an equilateral triangle with side a. Find the area of the signal board, using Heron’s formula.If its perimeter is 180 cm, what will be the area of the signal board? Solution: We
 Class 9 Maths NCERT Solutions Chapter 6: Coordinate Geometry Ex – 6.1 Question 1. How will you describe the position of a table lamp on your study table to another person? Solution: Let us consider the lamp as a point A and table as a plane. Take any two perpendicular edges of the table,
 Class 9 Maths NCERT Solutions Chapter 5: Triangles Ex – 5.1 Question 1. In quadrilateral ACBD, AC = AD and AB bisects ∠A (see figure). Show that ∆ABC ≅ ∆ABD. What can you say about BC and BD? Solution: In ∆ABC and ∆ABD, we have AC = AD (Given) ∠CAB = ∠DAB
 Class 9 Maths NCERT Solutions Chapter 4: Lines and Angles Ex – 4.1 Question 1. In figure, lines AB and CD intersect at 0. If ∠AOC + ∠BOE = 70° and ∠BOD = 40°, find ∠BOE and reflex ∠COE. Solution: Here, ∠AOC and ∠BOD are vertically opposite angles. ∴ ∠AOC = ∠BOD ⇒ ∠AOC
