UP Board Solutions Class 10 Maths Chapter 8 Circles Ex 82

Get the most accurate UP Board Solutions for Class 10 Maths Chapter 8 मंडलियां here. Updated for the 2026 27 academic session, these solutions are based on the latest UP Board textbooks for Class 10 Maths. Our expert-created answers for Class 10 Maths are available for free download in PDF format.

Detailed Chapter 8 मंडलियां UP Board Solutions for Class 10 Maths

For Class 10 students, solving UP Board textbook questions is the most effective way to build a strong conceptual foundation. Our Class 10 Maths solutions follow a detailed, step-by-step approach to ensure you understand the logic behind every answer. Practicing these Chapter 8 मंडलियां solutions will improve your exam performance.

Class 10 Maths Chapter 8 मंडलियां UP Board Solutions PDF

Exercise 8.2 Circles (Very Short Answer Type Questions)

 

Question 1. दिये गये चित्र में \( O \) केन्द्र वाले एक वृत्त के बिन्दु \( A \) पर \( PAQ \) एक स्पर्शी है तथा \( \angle BAQ = 60^\circ \) तब \( \angle ABC \) का मान ज्ञात कीजिए।
Answer: O A P Q B C \( 60^\circ \)
दिये गये चित्र के अनुसार:
\( \angle ACB = \angle BAQ = 60^\circ \) (एकान्तर वृत्त खण्ड प्रमेय के अनुसार, स्पर्श रेखा और जीवा के बीच का कोण, alternate segment में बने कोण के बराबर होता है।)
\( \angle BAC = 90^\circ \) (चूंकि \( BC \) वृत्त का व्यास है, अर्धवृत्त में बना कोण समकोण होता है।)
एक त्रिभुज के कोणों का योग 180 डिग्री होता है:
\( \angle ACB + \angle BAC + \angle ABC = 180^\circ \)
\( \implies \angle ABC = 180^\circ - (\angle ACB + \angle BAC) \)
\( \implies \angle ABC = 180^\circ - (60^\circ + 90^\circ) \)
\( \implies \angle ABC = 180^\circ - 150^\circ \)
\( \implies \angle ABC = 30^\circ \)
In simple words: चित्र में, स्पर्श रेखा \( PAQ \) और जीवा \( AB \) के बीच का कोण (\( \angle BAQ \)) \( 60^\circ \) है. Alternate Segment Theorem के अनुसार, यह कोण, वृत्त के alternate segment में बने कोण (\( \angle ACB \)) के बराबर होता है, इसलिए \( \angle ACB \) भी \( 60^\circ \) है. चूंकि \( BC \) व्यास है, तो अर्धवृत्त में बना कोण (\( \angle BAC \)) \( 90^\circ \) होता है. एक त्रिभुज \( ABC \) के तीनों कोणों का योग \( 180^\circ \) होता है, इसलिए \( \angle ABC \) का मान \( 30^\circ \) होगा.

🎯 Exam Tip: जब भी वृत्त में स्पर्श रेखा और जीवा से संबंधित प्रश्न आएं, तो एकान्तर वृत्त खण्ड प्रमेय (Alternate Segment Theorem) और अर्धवृत्त में बने कोण के \( 90^\circ \) होने की प्रमेय को याद रखें. ये प्रमेयें ऐसे प्रश्नों को हल करने की कुंजी हैं.

 

Question 2. दिये गये चित्र में, \( O \) केन्द्र वाले वृत्त के किसी बिन्दु \( P \) पर \( TPT' \) एक स्पर्शी है। यदि \( \angle APT = 65^\circ \) तथा \( \angle POA = x^\circ \) हो तो \( x \) का मान क्या होगा?
Answer: O P T T' A M \( 65^\circ \) x
दिये गये चित्र के अनुसार:
\( \angle AMP = \angle APT = 65^\circ \) (एकान्तर वृत्त खण्ड प्रमेय के अनुसार, स्पर्श रेखा और जीवा के बीच का कोण, alternate segment में बने कोण के बराबर होता है।)
हमें \( \angle POA \) का मान ज्ञात करना है, जो कि केंद्र पर बना कोण है।
हम जानते हैं कि वृत्त के केंद्र पर बना कोण, परिधि पर बने कोण का दोगुना होता है, यदि वे एक ही चाप (arc) द्वारा बने हों।
यहाँ, चाप \( AP \) केंद्र पर \( \angle POA \) बनाती है और परिधि पर \( \angle AMP \) बनाती है।
\( \implies \angle POA = 2 \times \angle AMP \)
\( \implies \angle POA

UP Board Solutions Class 10 Maths Chapter 8 मंडलियां

Students can now access the UP Board Solutions for Chapter 8 मंडलियां prepared by teachers on our website. These solutions cover all questions in exercise in your Class 10 Maths textbook. Each answer is updated based on the current academic session as per the latest UP Board syllabus.

Detailed Explanations for Chapter 8 मंडलियां

Our expert teachers have provided step-by-step explanations for all the difficult questions in the Class 10 Maths chapter. Along with the final answers, we have also explained the concept behind it to help you build stronger understanding of each topic. This will be really helpful for Class 10 students who want to understand both theoretical and practical questions. By studying these UP Board Questions and Answers your basic concepts will improve a lot.

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FAQs

Where can I find the latest UP Board Solutions Class 10 Maths Chapter 8 मंडलियां Exercise 82 for the 2026 27 session?

The complete and updated UP Board Solutions Class 10 Maths Chapter 8 मंडलियां Exercise 82 is available for free on StudiesToday.com. These solutions for Class 10 Maths are as per latest UP Board curriculum.

Are the Maths UP Board solutions for Class 10 updated for the new 50% competency-based exam pattern?

Yes, our experts have revised the UP Board Solutions Class 10 Maths Chapter 8 मंडलियां Exercise 82 as per 2026 exam pattern. All textbook exercises have been solved and have added explanation about how the Maths concepts are applied in case-study and assertion-reasoning questions.

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Yes, we provide bilingual support for Class 10 Maths. You can access UP Board Solutions Class 10 Maths Chapter 8 मंडलियां Exercise 82 in both English and Hindi medium.

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