Module 9- Activity 5: Reflect
A said ‘if length of a rectangle is increased by 1 and breadth decreased by 1 the area enclosed by the rectangle remains the same’. B said ‘No, A is wrong as the new area will increase’. C said ‘No, A and B both are wrong, the new area will decrease’. How will you handle this situation?
Take a moment to reflect and post your comment in the comment box.
Here both no.A and no. B are wrong because if the length is increased and breadth is decreased , so, the area will automatically change. So no.C is correct as the area is ultimately decreased.
ReplyDeleteArea of rectangle=l*b . suppose if length is 8cm and wide is 6cmthen, 8*6=48.If length increase by 1 and breadth decrease by 1,then area of rectangle=9*5=45.From the above statement C is correct situation.
Shamini
TGT IT
EMRS LAHAUL HP
Here both no.A and no. B are wrong because if the length is increased and breadth is decreased , so, the area will automatically change. So no.C is correct as the area is ultimately decreased.
ReplyDeleteArea of rectangle=l*b . suppose if length is 8cm and wide is 6cmthen, 8*6=48.If length increase by 1 and breadth decrease by 1,then area of rectangle=9*5=45.From the above statement C is correct situation.
Step by step explanation by giving the example and use the teaching learning method.The Area of Rectangle is a=l*b.
ReplyDeleteUdahran aur spsthikaran se samadhan
ReplyDeleteTo give a example with question
ReplyDeleteExample aur area of rectangle se question ka samadhan
ReplyDeleteक्षेत्रफल वही रहेगा लेकिन लंबाई चौड़ाई कम ज्यादा होगा। बच्चों को डायग्राम बना कर समझाना पड़ेगा। तभी बच्चों को समझ मे आएगा।
ReplyDeleteChhetra Fal me Koi antar nahi ayega. Samghne ka tarika badalna padega
ReplyDeleteArea remain same.Teacher have to be explain some different activities to students.
ReplyDeleteAccurate explanation of notion is required to be clear to students. Allowing the students for their conclusions, teacher should show them examples and give rational elucidation. The teacher should educate students about area of rectangle by citing examples.
ReplyDeleteif the difference between length and breadth is 1 unit we increase or decrease 1 in length or
ReplyDeletebreadth respectively in rectangle. the area of rectangle remain same.
and if the difference between Length and breadth are more than 1 unit the area of rectangle change.
Anil Kumar
EMRS Bharmour
CHITRA BANAKAR AUR KUCHH EXAMPLE DEKAR
ReplyDeleteIn the aforesaid situation ....the teacher should clar the doubts of students by making them to learn the mathematical formulas of finding out area.
ReplyDeleteBy citing some examples their doubts will automatically clear..
They will be clear their doubts by applying formulas to find area...and the learning outcomes will be achieved .
This comment has been removed by the author.
ReplyDeletewith example we will explain
ReplyDeletelength = 10 unit and breadth = 3 unit then area = 10x3=30 square unit
if length of rectangle is increased by 1 and breadth decreased by 1 then we have
length = 11 unit and breadth = 2 unit then area = 11x2=22 square unit
again if length of rectangle is increased by 1 and breadth decreased by 1 then we have
length = 12 unit and breadth = 1 unit then area = 12x1=12 square unit
again if length of rectangle is increased by 1 and breadth decreased by 1 then we have
length = 13 unit and breadth = 0 unit then area = 13x0=0 square unit
means we will get straight line. it shows that if length of rectangle is increased by 1 and breadth decreased by 1 then area of rectangle will decrease.
सबसे पहले हम बच्चे को यह सिखाएंगे की लंबाई और चौड़ाई क्या होती है उसके बाद हम यह बताएंगे बच्चे को कि यह दोनों मिलकर चतुर्भुज कैसे बनाता है उसके बाद हम हैं बताएंगे बच्चे को की चतुर्भुज का एरिया यानी कि क्षेत्रफल निकालने के लिए हम लंबाई और चौड़ाई को गुणा करते हैं अब हम बच्चे को यह सिखाएंगे कि रैक्टेंगल का एरिया कैसे निकालते हैं और वोऔर मान लो कि कोई पूर्व का रेक्टेंगल ऐसा था और उसको कम ज्यादा करने के बाद पूर्व का एरिया पहले निकाली फिर ज्यादा काम करके फिर से एरिया में
ReplyDeleteC will correct Because if the length will increased and breadth will decreased. so the area will be absolutely change.
ReplyDeleteसबसे पहले हम बच्चे को सिखाएंगे की लंबाई और चौड़ाई क्या होती है उसके पश्चात बताएंगे कि दोनों को मिलाकर चतुर्भुज कैसे बनाया जाता है। इसके बाद बच्चे को चतुर्भुज का एरिया यानी कि क्षेत्रफल निकालने के लिए लंबाई एवं चौड़ाई को गुणा करना बताएंगे। अब लंबाई एवं चौड़ाई को कम ज्यादा करने के बाद पुनः उसी विधि से क्षेत्रफल निकालना बताएंगे उसके पश्चात नए चतुर्भुज के क्षेत्रफल एवं पुराने चतुर्भुज के क्षेत्रफल की तुलना करेंगे। ऐसे दो तीन उदाहरण देकर शिक्षक द्वारा बच्चे को समझाया जाए।
ReplyDeleteHere both no.A and no. B are wrong because if the length is increased and breadth is decreased , so, the area will automatically change. So no.C is correct as the area is ultimately decreased.
ReplyDeleteWhere such a situation arises, a teacher should give the correct example and make the students aware of the correct formula.
ReplyDeleteसबसे पहले बच्चों को आयत के बारे में तथा उसका क्षेत्रफल कैसे निकाला जाता है ,के बारे में जानकारी देनी होगी। तत्पश्चात अलग-अलग उदाहरणों से समझाकर उनके सन्देह दूर किए जा सकते हैं।
ReplyDeleteStep by step explanation by giving the example and use the teaching learning method.
ReplyDeleteGive varias example set own theory and conclude
ReplyDeleteby some activities related to the length and width of rectangle we will get them done so that they donot get confused again
ReplyDelete
ReplyDeleteWhere such a situation arises, a teacher should give the correct example and make the students aware of the correct formula.
Mathematics teacher should help students make connections between the math topic and the real world.
ReplyDeleteचतुर्भुज की भुजाओं की अवधारणा को समझाना होगा ।बच्चो को भुजाओं की लम्बाई और चौड़ाई मे वृद्धि पर क्षेत्र फल होने वाले प्रभाव को समझाना होगा।
ReplyDeleteHere both no.A and no. B are wrong because if the length is increased and breadth is decreased , the area of rectangular will decreased. So no.C is correct as the area is ultimately decreased.The concept of rectangle arms has to be explained. Children will have to explain the effect of the area on the increase in length and width of the arms.
ReplyDeleteWith the help of diagram ellustrate the question and then use formula of Area=length×breadth.give them suitable example and take place them Area of rectangle will come out. Then he asked the right answer to all students that what effect shown if in length 1increase and 1decresa in breadth.
ReplyDeleteसबसे पहले बच्चों को लंबाई और चौड़ाई के बारे बताना होगा तत्पश्चात हमारे आसपास की वस्तु को ही लेकर उदाहरण देकर समझाएं तो बच्चों को समझने में आसानी होगा
ReplyDeleteThe concept of quadrilateral arms has to be understand. Childern have to understand the effect on the area on the increase in length and width of the arms.
ReplyDeleteHere both no.A and no. B are wrong because if the length is increased and breadth is decreased , so, the area will automatically change. So no.C is correct as the area is ultimately decreased.
ReplyDeleteArea of rectangle=l*b . suppose if length is 8cm and wide is 6cmthen, 8*6=48.If length increase by 1 and breadth decrease by 1,then area of rectangle=9*5=45.From the above statement C is correct situation.
As a teacher we can give them a example of rectangular object like page with desired dimensions and then alter that page with dimensions that required. Allowing the students for their conclusions.definately by looking the page in different situation they got result.and at last link this example with the formula of area of rectangle.
ReplyDeleteअलग - अलग स्थिति में तीनों A, B, C सही है। स्थिति -I जब b- I = 1चौड़ाई लम्बाई से 1 अधिक है तब क्षेत्रफल बराबर होगा 1)लम्बाई × चौडाई=3×4=12 2)(3+1)×(4-1)=4×3=12 स्थिति - 2 जब लम्बाई बड़ा है चौडाई से तब क्षेत्रफल कम होगा 1) 4 X3 = 12 2) (4+1) × (3-1) = 5×2 = 1 0 1) 6×4 = 2 4 2 )(6+1) × (4-1) = 7 × 3= 2 1 स्थिति - 3 जब चौड़ाई लम्बाईसे बड़ा है। अन्तर 1 से अधिक है।तब क्षेत्रफल अधिक होगा 1)4×6 = 2 4 2) (4+1) X (6-1) = 5 × 7 = 35
ReplyDeleteA एवं B का कथन गलत है, इसे उचित diagram और formula या आसपास के उदाहरण के माध्यम से बच्चों को समझा सकते हैं।
ReplyDeleteHere both no.A and no. B are wrong because if the length is increased and breadth is decreased , so, the area will automatically change. So no.C is correct as the area is ultimately decreased.
ReplyDeleteArea of rectangle=l*b . suppose if length is 8cm and wide is 6cmthen, 8*6=48.If length increase by 1 and breadth decrease by 1,then area of rectangle=9*5=45.From the above statement C is correct situation.
क्षेत्रफल में कोई अंतर नहीं आएगा. छात्रों को डायग्राम और चित्र के माध्यम से क्षेत्रफल ए और बी को समझाना पड़ेगा.
ReplyDeleteBy giving many example which will be solved by the students to clearify them that area will be change.
ReplyDelete
ReplyDeletePrecise description of idea is required to be clear to students. Allowing the students for their conclusions, teacher should show them examples and give rational elucidation. The teacher should educate students about area of rectangle by citing examples.
Rajpaul Mehta
TGT (Art) EMRS Nichar Kinnaur (HP)
ReplyDeletePrecise explanation of concept is required to be clear to students. Allowing the students for their conclusions, teacher should show them examples and give rational explanation. The teacher should educate students about area of rectangle by citing examples.
सर्वप्रथम छात्रों को लंबाई एवं चौड़ाई किस तरह से निकाली जाती है इसको समझाना होगा। तत्पश्चात त्रिभुज, चतुर्भुज ,पंचभुज ,षट्भुज आदि का रेखा चित्र बनाकर उन्हें समझाना होगा और चतुर्भुज का सूत्र बतलाना होगा।
ReplyDeleteAll three are right at different satuations.we can handle this problem by giving different examples such as.
ReplyDelete1) let L=5 W=4 then
Area=5*4=20
If L increased by 1,W decreased by1 then
Area=6*3=18 in this condition C is correct
2) let L=6,W=7
Area=42
If L increased by 1 ,W decreased by 1then
Area=7*6=42 in this condition
A is correct
3) let L =4, W=7
Area=4*7=28
If L increased by 1,W decreased by 1then
Area=5*6=30 in this condition
B is correct.
Thus A,B,C are correct.
Everyone has different prospective so we have to explain Step by step by giving the example and use the teaching learning method.The Area of Rectangle is a=l*b.
ReplyDelete