Class 9 Maths New NCERT | Chapter 6 | Lines and Angles | Exercise 6.1| All Questions | Doubt Xpert

“Join India’s #1 Free Doubt Solving Platform – Doubt Xpert (also known as Doubt Expert) 🚀" 📘 Class 9 Maths - Lines and Angles (Exercise 6.1) Get 100% clarity on every question from Chapter 6 — solved step-by-step as per the New NCERT 2025 Syllabus. Learn easy formulas, fast tricks, and board-exam focused tips. 📌 Help Us Grow! 👍 Like the video if it helped you 🔔 Subscribe for more NCERT-based solutions 💬 Drop your doubts in the comments — we reply or make videos for them! 📤 Share with your friends who need help in Maths 📲 Need help with any doubt? Send your question as an image on Telegram/WhatsApp – get a free video/image solution from us! 🔗 *Join Us Here:* Telegram: https://t.me/Doubt_Xpert WhatsApp: +91-9643619960 Instagram:   / doubtxpert   Twitter: https://x.com/DoubtXpert Subscribe:    / @doubtxpert   📚 Questions Covered in This Video (Exercise 6.1 – Lines and Angles): Question 1. In Fig. 6.13, lines AB and CD intersect at O. If ∠ AOC + ∠ BOE = 70° and ∠ BOD = 40°, find ∠ BOE and reflex ∠ COE. Question 2. In Fig. 6.14, lines XY and MN intersect at O. If ∠ POY = 90° and a : b = 2 : 3, find c. Question 3. In Fig. 6.15, ∠ PQR = ∠ PRQ, then prove that ∠ PQS = ∠ PRT. Question 4. In Fig. 6.16, if x + y = w + z, then prove that AOB is a line Question 5. In Fig. 6.17, POQ is a line. Ray OR is perpendicular to line PQ. OS is another ray lying between rays OP and OR. Prove that ∠ ROS =1/2 (∠ QOS – ∠ POS). Question 6. It is given that ∠ XYZ = 64° and XY is produced to point P. Draw a figure from the given information. If ray YQ bisects ∠ ZYP, find ∠ XYQ and reflex ∠ QYP. #Class9Maths #NCERTSolutions #LinesandAngles #MathsMadeEasy #Exercise6 #NCERTBooks #ExamPreparation #BoardExams #CBSEboard #DoubtXpert #DoubtExpert #NCERT2025 #FreeDoubtSolving