Class 9 maths ch 8 ex 8.1

NCERT Solutions for Class 9 Maths Chapter 8 Quadrilaterals NCERT Solutions for Class 9 Maths Chapter 8 Quadrilaterals are provided here. Our NCERT Maths solutions contain all the questions of the NCERT textbook that are solved and explained beautifully. Here you will get complete NCERT Solutions for Class 9 Maths Chapter 8 all exercises Exercise in one place. These solutions are prepared by the subject experts and as per the latest NCERT syllabus and guidelines. CBSE Class 9 Students who wish to score good marks in the maths exam must practice these questions regularly. Table of Contents • • Class 9 Maths Chapter 8 Quadrilaterals NCERT Solutions Below we have provided the solutions of each exercise of the chapter. Go through the links to access the solutions of exercises you want. You should also check out our NCERT Solutions for Class 9 Maths Chapter 8 Exercise 8.1 NCERT Solutions for Class 9 Maths Chapter 8 Exercise 8.2 NCERT Solutions for Class 9 Maths Chapter 8 – Topic Discussion Below we have listed the topics that have been discussed in this chapter. • The Mid-point Theorem • Another Condition for a Quadrilateral to be a Parallelogram • Properties of a Parallelogram • Angle Sum Property of a Quadrilateral • Types of Quadrilaterals

NCERT Solutions for Class 9 Maths Chapter 8 Quadrilaterals NCERT Solutions for Class 9 Maths Chapter 8 Quadrilaterals are an educational aid for students to solve and learn simple and difficult problems. It includes a complete set of questions organised with an advanced level of difficulty, which provides students ample opportunity to apply their knowledge and skills. Get free The NCERT Solutions will help the students to understand the concept of Quadrilaterals – mainly the basics, properties, and some important theorems. The Previous Next Access Answers to NCERT Class 9 Maths Chapter 8 – Quadrilaterals Exercise 8.1 Page: 146 1. The angles of a quadrilateral are in the ratio 3 : 5 : 9 : 13. Find all the angles of the quadrilateral. Solution: Let the common ratio between the angles be x. We know that the sum of the interior angles of the quadrilateral = 360° Now, 3x+5x+9x+13x = 360° ⇒ 30x = 360° ⇒ x = 12° , Angles of the quadrilateral are: 3x = 3×12° = 36° 5x = 5×12° = 60° 9x = 9×12° = 108° 13x = 13×12° = 156° 2. If the diagonals of a parallelogram are equal, then show that it is a rectangle. Solution: Given that, AC = BD To show that ABCD is a rectangle if the diagonals of a parallelogram are equal To show ABCD is a rectangle, we have to prove that one of its interior angles is right-angled. Proof, In ΔABC and ΔBAD, AB = BA (Common) BC = AD (Opposite sides of a parallelogram are equal) AC = BD (Given) Therefore, ΔABC ≅ ΔBAD [SSS congruency] â...

NCERT Solutions for Class 12 Maths Exercise 8.1 Chapter 8 Application of Integrals NCERT Solutions for Class 12 Maths Chapter 8 Application of Integrals Exercise 8.1 – CBSE Free PDF Download NCERT Solutions for Class 12 Maths Chapter 8 Application of Integrals contain solutions for all Exercise 8.1 questions. BYJU’S subject experts have prepared these solutions in an easy way with the help of suitable diagrams. Students can download the Access Answers to NCERT Class 12 Maths Chapter 8 Application of Integrals Exercise 8.1 Page Number 365

Board CBSE Textbook NCERT Class Class 9 Subject Maths Chapter Chapter 8 Chapter Name Linear Equations in Two Variables Exercise Ex 8.1 Number of Questions Solved 2 Category NCERT Solutions for Class 9 Maths Chapter 8 Linear Equations in Two Variables Ex 8.1 Question 1. The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement. (Take the cost of a notebook to be ₹ x and that of a pen to be ₹ y) Solution: Let the cost of a notebook = ₹ x and the cost of a pen = ₹ y According to question, Cost of a notebook = 2(cost of a pen) ∴ x = 2y ⇒ x- 2y = 0 Question 2. Express the following linear equations in the form ax + by + c = 0 and indicate the values of a, b and c in each case. (i) 2x + 3y = 9.\(\overline \) andc = – 10 (iii)– 2x+ 3y = 6 ⇒ -2x + 3y – 6=0 On comparing with ax + by + c = 0, then the values of a = – 2, b = 3 and c = – 6 (iv) x = 3y ⇒ x-3y+0=0 On comparing with ax + by + c = 0, then the values of a = 1, b = – 3 and c = 0. (v) 2x = -5y ⇒ 2x + 5y + 0=0 On comparing with ax + by + c = 0, then the values of a = 2, b = 5 and c = 0. (vi) 3x + 2 = 0 ⇒ 3x + 0y + 2 = 0 On comparing with ax + by + c = 0, then the values of a = 3, b = 0 and , c= 2. (vii) y – 2 = 0 ⇒0x+y-2 = 0 On comparing with ax + by + c = 0, then the values of a = 0, b = 1 and c = – 2. (viii) 5 = 2x ⇒ 2x + 0y – 5 = 0 On comparing with ax + by + c = 0, then the values of a = 2, b = 0 and c = – 5. We hope the NCERT Solutions for Class 9 Maths Chapte...

Table of Contents • • • • • • • • • • • • • • • • • • NCERT Solutions for Class 9 Maths Exercise 8.1 book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE board exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 9 Maths chapter wise NCERT solution for Maths Book for all the chapters can be downloaded from our website and myCBSEguide mobile app for free. NCERT solutions for Class 9 Maths Quadrilateral NCERT Solutions for Class 9 Mathematics Quadrilaterals 1. The angles of a quadrilateral are in the ratio 3: 5: 9: 13. Find all angles of the quadrilateral. Ans. Let in quadrilateral ABCD, A = B = C = and D = Since, sum of all the angles of a quadrilateral = A + B + C + D = Now A = B = C = And D = Hence angles of given quadrilateral are and 2. If the diagonals of a parallelogram are equal, show that it is a rectangle. Ans. Given: ABCD is a parallelogram with diagonal AC = diagonal BD To prove: ABCD is a rectangle. Proof: In triangles ABC and ABD, AB = AB[Common] AC = BD[Given] AD = BC[opp. Sides of a gm] ABC BAD [By SSS congruency] DAB = CBA [By C.P.C.T.] ……….(i) But DAB + CBA = ……….(ii) [ AD BC and AB cuts them, the sum of the interior angles of the same side of transversal is ] From eq. (i) and (ii), DAB = CBA = Hence ABCD is a rectangle. 3. Show that is diagonals of a quadrilateral bisect each other at right angles, then it is a r...

NCERT Solutions for Class 9 Maths Chapter 8 Quadrilaterals Ex 8.1 – Free PDF Free PDF of NCERT Solutions for Class 9 Maths Chapter 8 Exercise 8.1 prepared by expert Mathematics teacher at Mathongo.com as per CBSE (NCERT) books guidelines. Download our Class 9 Maths Chapter 8 Quadrilaterals Ex 8.1 questions with solutions to help you to revise complete syllabus and score more marks in your exams. FREE PDF • • • • • • • • •