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NCERT Solutions for Class 7 Maths Chapter 5 - In Hindi

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NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles In Hindi PDF Download

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We, at Vedantu, offer free NCERT Solutions in English medium and Hindi medium for all the classes as well. Created by subject matter experts, these NCERT Solutions in Hindi are very helpful to the students of all classes.


Class:

NCERT Solutions for Class 7

Subject:

Class 7 Maths

Chapter Name:

Chapter 5 - Lines and Angles

Content-Type:

Text, Videos, Images and PDF Format

Academic Year:

2024-25

Medium:

English and Hindi

Available Materials:

  • Chapter Wise

  • Exercise Wise

Other Materials

  • Important Questions

  • Revision Notes

NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles In Hindi

अभ्यास 5.1

1. निम्नलिखित कोणों में से प्रत्येक का पूरक ज्ञात कीजिए:


set of angles


उत्तर: (संकेत: पूरक कोण \[={{90}^{0}}\text{ }\]दिया हुआ कोण)

(i) $ \text{ 9}{{\text{0}}^{0}}\text{-2}{{\text{0}}^{0}}\text{=}70{}^\circ $

(ii) $ \text{ 9}{{\text{0}}^{0}}\text{-6}{{\text{3}}^{0}}\text{=}27{}^\circ $

(iii) $\text{ 9}{{\text{0}}^{o}}\text{-5}{{\text{7}}^{o}}\text{=}33{}^\circ $


2. निम्नलिखित कोणों में से प्रत्येक का संपूरक ज्ञात कीजिए:


105 degree angle


 

Set of angles 87 and 154

उत्तर: (संकेत: संपूरक कोण \[={{180}^{0}}\text{ }\]दिया हुआ कोण)

(i) $ \text{ 18}{{\text{0}}^{0}}\text{-10}{{\text{5}}^{0}}\text{=}75{}^\circ$

(ii) $ \text{ 18}{{\text{0}}^{0}}\text{-8}{{\text{7}}^{0}}\text{=93}{}^\circ $

(iii) $ \text{ 18}{{\text{0}}^{o}}\text{-15}{{\text{4}}^{o}}\text{=26}{}^\circ $


3. कोणों के निम्नलिखित युग्मों में से पूरक और संपूरक युग्मों की पृथक-पृथक पहचान कीजिए:

(I). ${{65}^{0}},\text{ }{{115}^{0}}$

(II). ${{63}^{0}},\text{ }{{27}^{0}}$

(III). ${{112}^{0}},\text{ }{{68}^{0}} $

(IV). ${{130}^{0}},\text{ }{{50}^{0}} $

(V). ${{45}^{0}},\text{ }{{45}^{0}} $

\[VI){{80}^{0}},\text{ }{{10}^{0}}\]

उत्तर: 

(i) \[{{65}^{0}}+{{115}^{0}}={{180}^{0}}\](संपूरक), 

(ii) \[{{63}^{0}}+{{27}^{0}}={{90}^{0}}\](पूरक),

(iii) \[{{112}^{0}}+{{68}^{0}}={{180}^{0}}\](संपूरक)

(iv) \[{{130}^{0}}+{{50}^{0}}={{180}^{0}}\](संपूरक)

(v) \[{{45}^{0}}+{{45}^{0}}={{90}^{0}}\]( पूरक)

(vi) \[{{80}^{0}}+{{10}^{0}}={{90}^{0}}\](पूरक)


4. ऐसा कोण ज्ञात कीजिए जो अपने पूरक के समान हो।

उत्तर: माना कोण तथा उसके पूरक मान \[=a\]

$a+a ={{90}^{0}}$

$ 2a ={{90}^{0}} = {{45}^{0}} $

अतः \[{{45}^{0}}\] का कोण अपने पूरक कोणो के समान है।


5. ऐसा कोण ज्ञात कीजिए जो अपने संपूरक के समान हो।

उत्तर: माना कोण तथा उसके संपूरक मान \[=a\]

$ a+a ={{180}^{0}} $ 

$ 2a ={{180}^{0}}  = {{90}^{0}} $

अतः \[{{90}^{0}}\] का कोण अपने संपूरक कोणो के समान है।


6. दी हुई आकृति में कोण \[\angle \mathbf{1}\] और कोण \[\angle \mathbf{2}\] संपूरक कोण हैं। यदि कोण \[\angle \mathbf{1}\]में कमी की जाती है, तो कोण \[\angle \mathbf{2}\] में क्या परिवर्तन होगा ताकि दोनों कोण फिर भी संपूरक ही रहें।


Supplementary Angle


उत्तर: कोण \[\angle \mathbf{1}\] और कोण \[\angle \mathbf{2}\] दोनों व्युत्क्रमानुपाती  है,अतः एक कोण के बढ्ने से दूसरा का मान कम होगा।


7. क्या ऐसे दो कोण संपूरक हो सकते हैं यदि उनमें से दोनों

(i). न्यून कोण हैं?

(ii). अधिक कोण हैं?

(iii). समकोण हैं?

उत्तर: 

(i). नहीं, 

(ii). नहीं

(iii). हाँ


8. एक कोण \[\mathbf{4}{{\mathbf{5}}^{0}}\]से बड़ा है। क्या इसका पूरक कोण \[\mathbf{4}{{\mathbf{5}}^{0}}\]से बड़ा है अथवा 45˚ के बराबर है अथवा \[\mathbf{4}{{\mathbf{5}}^{0}}\]से छोटा है?

उत्तर: माना ,तो पूरक कोण \[a\] और \[b\] है,

इसीलिए \[a+b={{90}^{0}}\]

दिया है, \[a>45\]˚ 

दोनों ओर \[b\] जोड़ने पर,

$ a+b>{{45}^{0}}+b $

$ {{90}^{0}}>{{45}^{0}}+b $ 

$ {{90}^{0}}-{{45}^{0}}>b $ 

$ b<{{45}^{0}} $

अतः इसका पूरक कोण \[{{45}^{0}}\] से कम होगा। 


9. संलग्न आकृति में:

Figure containing a set of angles


(i). क्या \[\angle 1,\angle 2\]का आसन्न है?

(ii). क्या \[\angle AOC,\angle AOE\] का आसन्न है?

(iii). क्या \[\angle COE\] एवं \[\angle EOD\] रैखिक युग्म बनाते हैं?

(iv). क्या \[\angle BOD\] एवं \[\angle DOA\] संपूरक है?

(v). क्या \[\angle 1\] का उर्ध्वाधर सम्मुख कोण ∠4 है?

(vi). \[\angle 5\] का उर्ध्वाधर सम्मुख कोण क्या है?

उत्तर: (i) हाँ, (ii) नहीं, (iii) हाँ, (iv) हाँ, (v) हाँ, (vi) \[\angle 2\text{ }+\angle 3\]


10. पहचानिए कि कोणों के कौन से युग्म:


In which angles 1 and 5 form a linear pair


(i). उर्ध्वाधर सम्मुख कोण हैं।

(ii). रैखिक युग्म हैं।

उत्तर:  \[\left( i \right)\angle 1,\angle 4\text{ }; \angle5,\angle2 + \angle3\] 

\[\left( ii \right)\angle 5,\angle 1;\angle 5,\angle 4\]


11. निम्नलिखित आकृति में क्या कोण \[\mathbf{1}\], कोण \[\mathbf{2}\] का आसन्न है? कारण लिखिए।

उत्तर: दोनों कोणों के शीर्ष उभयनिष्ठ नहीं हैं। इसलिए ये आसन्न कोण नहीं हैं।


Figure in which angles 1 and 2 are present


12. निम्नलिखित में से प्रत्येक में कोण \[\mathbf{x},\text{ }\mathbf{y}\] एवं \[\mathbf{z}\] के मान ज्ञात कीजिए।


Figure in which two angles Y and Z form a linear pair


उत्तर: \[(i)~x=55{}^\circ ~\] (उर्ध्वाधर सम्मुख कोण)

\[z+55{}^\circ =180{}^\circ \] (कोणों के रैखिक जोड़े)

\[z=180{}^\circ -55{}^\circ =25{}^\circ \]

\[y=z=25{}^\circ ~\] (उर्ध्वाधर सम्मुख कोण)

\[x=55{}^\circ ,~y=25{}^\circ ,z=25{}^\circ \]

उत्तर: \[(ii)~z=40{}^\circ ~\] (उर्ध्वाधर सम्मुख कोण)

\[y=180-40=140{}^\circ ~\] (कोणों के रैखिक जोड़े)

\[y=x+25=140{}^\circ \]° (उर्ध्वाधर सम्मुख कोण)

\[x=140-25=115{}^\circ \]

\[x=115{}^\circ ,~y=140{}^\circ ,~z=40{}^\circ \]


13. रिक्त स्थानों की पूर्ति कीजिए:

(i). यदि दो कोण पूरक हैं, तो उनके मापों का योग 90° है।

(ii). यदि दो कोण संपूरक हैं, तो उनके मापों का योग 180° है।

(iii). रैखिक युग्म बनाने वाले दो कोण समपूरक होते हैं।

(iv). यदि दो आसन्न कोण संपूरक हैं, तो वे रैखिक युग्म बनाते हैं।

(v). यदि दो रेखाएँ एक दूसरे को एक बिंदु पर प्रतिच्छेद करती हैं तो शीर्षाभिमुख कोण हमेशा बराबर होते हैं।

(vi). यदि दो रेखाएँ एक दूसरे को एक बिंदु पर प्रतिच्छेद करती है और शीर्षाभिमुख कोणों का एक युग्म न्यून कोण है, तो शीर्षाभिमुख कोणों का दूसरा युग्म अधिककोण है।


14. संलग्न आकृति में निम्नलिखित कोण युग्मों के नाम दीजिए:


Figure in which AOC is a linear pair, image credits


(i). उर्ध्वाधर सम्मुख अधिक कोण

(ii). आसन्न पूरक कोण

(iii). समान संपूरक कोण

(iv). असमान संपूरक कोण

(v). आसन्न कोण जो रैखिक युग्म नहीं बनाते हैं।

उत्तर: 

$\left( i \right)\angle AOD\text{ }=\angle BOC\text{ }\left( ii \right)\angle BOA,\angle AOE\text{ } $

$ \left( iii \right)\angle BOE,\angle EOD\text{ }\left( iv \right)\angle AOE,\angle EOC\text{ } $

$ \left( v \right)\angle AOE,\angle EOD $


अभ्यास 5.2

1. निम्नलिखित कथनों में से प्रत्येक कथन में उपयोग किए गए गुणधर्म का वर्णन कीजिए।


Figure having two parallel lines a and b


(i). यदि \[a||b\], तो \[~~\angle 1\text{ }=\angle 5\]

(ii). यदि \[\angle 4\text{ }=\angle 6\], तो \[a||b\]

(iii). यदि \[\angle 4\text{ }+\angle 5\text{ }=\text{ }{{180}^{0}}\], तो \[a||b\]

उत्तर: 

(i) संगत कोण(तो ये बराबर होंगे क्योकि जब दो समांतर रेखाओ को कोई तिर्यक छेदी रेखा काटती है तो संगत कोण बराबर होते है ), 

(ii) एकांतर कोण (तो \[a||b\]होगा ,क्योकि जब दो समांतर रेखाओ को कोई तिर्यक छेदी रेखा काटती है तो एकांतर कोण बराबर होते है) 

(iii) तिर्यक के एक ही ओर के अंतर्कोणों का जोड़ =\[\angle 4+\angle 5={{180}^{0}}\] (क्योकि जब दो समांतर रेखाओ को कोई तिर्यक छेदी रेखा काटती है तो एकांतर कोण बराबर होते है)


2. आकृति में निम्नलिखित की पहचान कीजिए:


Figure in which two parallel lines a and b and transversal line c


(i). संगत कोणों के युग्म

(ii). अंत: एकांतर कोणों के युग्म

(iii). तिर्यक छेदी रेखा के एक तरफ बने अंत:कोणों के युग्म

(iv). उर्ध्वाधर सम्मुख कोण

उत्तर: (i) संगत कोणों के युग्म \[\angle 1,\angle 5:\angle 2,\angle 6:\angle 3,\angle 7:\angle 4,\angle 8\]

(ii) अंत: एकांतर कोणों के युग्म \[\angle 3,\angle 5:\angle 2,\angle 8\]

(iii तिर्यक छेदी रेखा के एक तरफ बने अंत:कोणों के युग्म\[\angle 3,\angle 8:\angle 2,\angle 5\].

(iv) शीर्षाभिमुख कोण \[\angle 1,\angle 3:\angle 2,\angle 4;\angle 6,\angle 8;\angle 5,\angle 7\]


3. संलग्न आकृति में \[\mathbf{p}||\mathbf{q}\] अज्ञात कोण ज्ञात कीजिए।


Figure having two parallel lines p and q


उत्तर: \[\angle f\text{ }=\angle e\] (शीर्षाभिमुख कोण)

\[\angle e\text{ }=\text{ }180{}^\circ \text{ }-\text{ }125{}^\circ \text{ }=\text{ }55{}^\circ \] (कोणों के रैखिक युग्म)

\[\angle a\text{ }=\angle e\text{ }=\text{ }55{}^\circ \] (संगत कोण)

\[\angle d\text{ }=\text{ }125{}^\circ \] (संगत कोण)

\[\angle b\text{ }=\angle d\text{ }=\text{ }125{}^\circ \] (शीर्षाभिमुख कोण)

\[\angle c\text{ }=\angle a\text{ }=\text{ }55{}^\circ \] (शीर्षाभिमुख कोण)

\[\angle a\text{ }=\text{ }55{}^\circ ,\angle b\text{ }=\text{ }125{}^\circ ,\angle c\text{ }=\text{ }55{}^\circ ,\angle d\text{ }=\text{ }125{}^\circ ,\angle e\text{ }=\text{ }55{}^\circ ,\angle f\text{ }=\text{ }55{}^\circ \]


4. यदि \[l||\mathbf{m}\] है, तो निम्नलिखित आकृतियों में प्रत्येक में \[\mathbf{x}\] का मान ज्ञात कीजिए।


A set of two figures having two parallel lines l and m and a and b


उत्तर: 

(i) रेखा \[t\] पर \[110{}^\circ \] का रैखिक युग्म \[=180{}^\circ \text{ }\text{--}110{}^\circ \text{ }=\text{ }70{}^\circ \]

(ii) रेखा $l$ और $m$ तिर्यक छेदी रेखाए है इस प्रकार \[\text{l}||\text{m}\] और \[\text{a}\mathbf{||}\text{b}\] रेखाए संगत कोण बना रही है .

इसीलिए,  $ x=100{}^\circ $ 


5. दी हुई आकृति में, दो कोणों की भुजाएँ समांतर हैं।


Set of two angles in which the sides of the two angles are parallel


यदि कोण \[ABC\text{ }=\text{ }70\]˚ है, तो

I. कोण \[DGC\] ज्ञात कीजिए।

II. कोण \[DEF\] ज्ञात कीजिए।

उत्तर: 

\[(I)\angle DGC\text{ }=\angle ABC\text{ }=\text{ }70{}^\circ \] (संगत कोण)

\[(II) \angle DEF\text{ }=\angle DGC\text{ }=\text{ }70{}^\circ \] (संगत कोण)


6. नीचे दी हुई आकृतियों में निर्णय लीजिए कि क्या \[\mathbf{l},~\mathbf{m}~\] के समांतर है।


Figure in which two angles are 44 and 126 degrees



Figure in which both angles are 75 degrees


Figure in which two angles are 57 and 123 degrees


Figure in which two angles are 72 and 98 degrees


उत्तर:

(i) नहीं, क्योंकि तिर्यक के एक ओर के अंत:कोणों का योग दो समकोण के बराबर नहीं है।,

(ii) नहीं, 

(iii) हाँ, 

(iv) नहीं


NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles In Hindi

Chapter-wise NCERT Solutions are provided everywhere on the internet with an aim to help the students to gain a comprehensive understanding. Class 7 Maths Chapter 5 solution Hindi mediums are created by our in-house experts keeping the understanding ability of all types of candidates in mind. NCERT textbooks and solutions are built to give a strong foundation to every concept. These NCERT Solutions for Class 7 Maths Chapter 5 in Hindi ensure a smooth understanding of all the concepts including the advanced concepts covered in the textbook.

NCERT Solutions for Class 7 Maths Chapter 5 in Hindi medium PDF download are easily available on our official website (vedantu.com). Upon visiting the website, you have to register on the website with your phone number and email address. Then you will be able to download all the study materials of your preference in a click. You can also download the Class 7 Maths Lines and Angles solution Hindi medium from Vedantu app as well by following the similar procedures, but you have to download the app from Google play store before doing that. 

NCERT Solutions in Hindi medium have been created keeping those students in mind who are studying in a Hindi medium school. These NCERT Solutions for Class 7 Maths Lines and Angles in Hindi medium pdf download have innumerable benefits as these are created in simple and easy-to-understand language. The best feature of these solutions is a free download option. Students of Class 7 can download these solutions at any time as per their convenience for self-study purpose. 

These solutions are nothing but a compilation of all the answers to the questions of the textbook exercises. The answers/ solutions are given in a stepwise format and very well researched by the subject matter experts who have relevant experience in this field. Relevant diagrams, graphs, illustrations are provided along with the answers wherever required. In nutshell, NCERT Solutions for Class 7 Maths in Hindi come really handy in exam preparation and quick revision as well prior to the final examinations.

FAQs on NCERT Solutions for Class 7 Maths Chapter 5 - In Hindi

1. How to complete the syllabus of Class 7 Maths in COVID-19 lock-down situation?

It is necessary for students to make and follow a routine. This will help them in completing the assignments systematically. It is important to follow the topics taught by the teachers on a daily basis. Moreover, to get perfect in your task, it is advisable to practice what has been taught regularly so that it is retained in the minds of the students. The student should follow the NCERT solutions and practice the exercises given there to get a perfect and satisfying observation regarding their subjects. These exercises even have detailed answers, making it even easier for the students to get hold of the content. 

2. Is Class 7 Maths easy to understand?

As it is always said that with practice one always achieves perfection. Hence, when one is strong in their basic and rudimentary concepts, it gets easier for them to solve anything that is given to them in the examination. It is advised to practice the concepts taught in Class on a regular basis. The NCERT solutions can aid the students to achieve this. The exercises are designed by subject matter experts in a simple, comprehensible and easy language. The answers to these exercises are also provided with detailed and explanatory passages. This makes the task of the student easier in understanding concepts. These solutions can be availed by the students from the website of Vedantu, which has free PDFs on every subject.

3. How did the NCERT Solutions for Class 7 Maths help me?

The NCERT Solutions for Class 7 have detailed analytical answers making it easier for the students to grasp the concepts. These exercises are designed by subject matter experts to meet the needs of the students. They follow the procedure and instructions of CBSE and provide exercises that will help in the development of the skills and knowledge of the child. Practising these will give a concrete idea of the basic and rudimentary concepts, and once these are looked into, it gets easier to solve the complex questions. Therefore, it helps in achieving good grades in the exam. 

4. From where can I get the Maths Class 7 NCERT Solutions PDF for free?

Free NCERT Solutions for Class 7 Maths can be availed for free on the website of Vedantu (vedantu.com). Students can also download the mobile app of Vedantu from the Google Playstore. Vedantu provides free PDFs to students, which they can easily download and practice to improve their skills and knowledge. These are designed following the pattern and instructions of CBSE, which helps in the better understanding of the concepts. They also have practice exercises, that the students can avail themselves of for free. These exercises have detailed answers that will help in clearing all the doubts that may arise in the mind of the child. 

5. What are the topics that are covered in Chapter 5 Of Class 7 Maths?

The topics covered by NCERT solutions of Class 7 Maths are;

  • A basic introduction to Lines and Angles

  • Related Angles

  • Complementary angles

  • Supplementary angles

  • Adjacent angles

  • Vertically Opposite angles 

  • Linear pair

  • Pairs of Lines

  • Intersecting lines

  • Transversal

  • Transversal of Parallel lines

  • Angles made by the transversal

  • Checking for parallel lines

All these topics are covered in detail in the NCERT solutions with different exercises based on these. This helps the students practice and develop their skills. Moreover, these exercises have answers that are explained in detail, making it an easy process for the understanding of the student.