Download MSBSHSE Solutions for Class 7 Maths Chapter 04 Set 15 Angles and Pairs of Angles
Explore reliable textbook solutions for Chapter 04 Set 15 Angles and Pairs of Angles tailored for Class 7 learners. Utilizing these Maths answers ensures thorough preparation and strengthens foundational knowledge before final MSBSHSE evaluations.
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Question 1. Observe the figure and complete the table for ∠AWB.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक कोण (∠AWB) को दर्शाता है जिसका शीर्ष बिंदु W है। किरण WA और WB इस कोण की भुजाएँ हैं। चित्र में कोण के अंदर बिंदु C, R, N, X दिखाए गए हैं, और कोण के बाहर बिंदु T, U, Q, V, Y दिखाए गए हैं। भुजाओं पर बिंदु A, W, G, B स्थित हैं।
Answer:
| Points in the interior | point C, point R, point N, point X |
| Points in the exterior | point T, point U, point Q, point V, point Y |
| Points on the arms of the angles | point A, point W, point G, point B |
In simple words: The table categorizes points in relation to angle AWB: those inside (interior), those outside (exterior), and those lying directly on its arms (rays WA and WB).
🎯 Exam Tip: Accurately identifying points relative to an angle's interior, exterior, and arms is crucial for scoring. Pay attention to the vertex and rays forming the angle.
Question 2. Name the pairs of adjacent angles in the figures below.
(i)
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक बिंदु N को शीर्ष के रूप में दिखाता है, जिससे तीन किरणें NA, NB और NC निकल रही हैं। इससे ∠ANB, ∠BNC और ∠ANC कोण बनते हैं।
(ii)
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक बिंदु Q को शीर्ष के रूप में दिखाता है, जिससे तीन किरणें QP, QR और QT निकल रही हैं। किरण QR पर एक बिंदु S भी स्थित है। इससे ∠PQR और ∠PQT जैसे कोण बनते हैं।
Answer:
(i) ∠ANB and ∠ANC
∠BNA and ∠BNC
∠ANC and ∠BNC
(ii) ∠PQR and ∠PQT
In simple words: Adjacent angles share a common vertex and a common arm, but their interiors do not overlap. The solutions list such pairs from the provided diagrams.
🎯 Exam Tip: To identify adjacent angles, always look for a common vertex and a common ray between the two angles. Ensure their interiors are distinct.
Question 3. Are the following pairs adjacent angles? If not, state the reason.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक सामान्य शीर्ष बिंदु M से निकलने वाली विभिन्न किरणों (MN, MR, MS, MQ, MT, MP) को दर्शाता है, जिससे कई कोण बनते हैं। इन कोणों के जोड़े की सन्निकटता का मूल्यांकन किया जाना है।
1. ∠PMQ and ∠RMQ
2. ∠RMQ and ∠SMR
3. ∠RMS and ∠RMT
4. ∠SMT and ∠RMS
Answer:
1. ∠PMQ and ∠RMQ are adjacent angles.
2. ∠RMQ and ∠SMR not adjacent angles since they do not have separate interiors.
3. ∠RMS and ∠RMT not adjacent angles since they do not have separate interiors.
4. ∠SMT and ∠RMS are adjacent angles.
In simple words: Two angles are adjacent if they share a common vertex and arm, but their internal regions do not overlap. Pairs 2 and 3 violate the non-overlapping interior condition, hence they are not adjacent.
🎯 Exam Tip: When evaluating if angles are adjacent, always verify three conditions: common vertex, common arm, and non-overlapping interiors. Missing any one condition means they are not adjacent.
Maharashtra Board Class 7 Maths Chapter 4 Angles And Pairs Of Angles Practice Set 15 Intext Questions And Activities
Question 1. Observe the figure alongside and write the answers.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक कोण (∠ABC) को दर्शाता है जिसका शीर्ष बिंदु B है। किरण BA और BC इस कोण की भुजाएँ हैं। बिंदु A और C भी भुजाओं पर स्थित हैं।
1. Write the name of the angle shown alongside__.
2. Write the name of its vertex__.
3. Write the names of its arms__.
4. Write the names of the points marked on its arms__.
Answer:
1. ∠ABC
2. Point B
3. Ray BA, ray BC
4. Points A, B, C
In simple words: This question asks to identify the components of a given angle, including its name, vertex, arms (rays), and points located on those arms.
🎯 Exam Tip: Always remember that an angle is named by a point on one arm, the vertex, and a point on the other arm (e.g., ∠ABC). The vertex is the common endpoint of the two rays forming the angle.
Free MSBSHSE Textbook Explanations: Class 7 Maths Chapter 04 Set 15 Angles and Pairs of Angles
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