একটি ত্রিভুজের বাহুর দৈর্ঘ্য যথাক্রমে 20m, 21m ও 29m হলে, ক্ষেত্রফল কত?

Created: 4 years ago | Updated: 1 day ago

Updated: 1 day ago

ক

200 $m^{2}$
খ

210 $m^{2}$
গ

290 $m^{2}$
ঘ

300 $m^{2}$

PSC DTE – Head Assistant / Accountant / Computer Operator BCS 24th BCS Preli - 2003 DIP Assistant Director - 2014 NTRCA 14th NTRCA - 2017 BJS 4th BJS Preli - 2009 MoLJPA Assistant Secretary (Drafting) - 2001 MoFA Administrative Officer - 2004 UCB UCB Officer - 2010 MoWCA Upazila Women Affairs Officer - 2016 Law Ministry Sub-Registrar - 2016 RAKUB RAKUB Officer (Cash) - 2010 BAFL Alfalah MTO - 2005 BRDB Officer - 2012 REB Assistant Secretary/Assistant Director (Admin) - 2013 DG Food SI Food - 2012 BRDB URDO - 2012 Secondary Teacher Govt Secondary Teacher - 2011 31st BCS Preli - 2011 DNS Assistant Director - 2009 CBHC CHCP - 2018 BMET Instructor (TTC) - 2018 Rupali Bank Rupali Officer - 2018 Sonali Bank Sonali Senior Officer - 2018 Primary Teacher Primary Assistant Teacher - 2019 16th NTRCA College - 2019 BREB – Assistant Enforcement Coordinator - 2019 BFSA – Various Posts - 2019 JBC – Upper Division Assistant - 2021 NSI – Wireless Operator and Accountant cum-Cashier - 2021 DTE – Head Assistant / Accountant / Computer Operator - 2021 TMED – Office Assistant cum-Computer Typist - 2021 TMED – Various Posts - 2021 OCAG – Auditor - 2021 EED – Office Sohayak - 2021 Combined Bank Combined Bank Officer - 2021 BREB – Assistant Enforcement Coordinator - 2021 CGA – Auditor - 2022 Biman – Ground Service Assistant - 2022 MOR Guard Grade-2 - 2022 FSCD Station Officer - 2022 15th NTRCA - 2019 CBHC CHCP - 2022 DLS Laboratory Technician - 2023 DGHS – Medical Technician - 2023 PKB PKB Officer - 2023 KB Karmasangsthan Officer - 2023 MRA – Assistant Director - 2023 FSCD – Firefighter - 2023 Prisons – Jail Warder & Female Jail Warder - 2024 BUET Petrobangla – Sub-Assistant Engineer - 2024 Biman – Traffic Helper - 2024 OBL ONE Officer - 2025 GrameenBank Grameen Officer - 2025 ECS – Driver / Cleaner - 2025 EED – SAE (Civil) - 2025 IBBL IBBL Officer - 2017 CAAB – Security Supervisor - 2025 FSCD – Station Officer (Non Cadre) - 2025 Combined Bank Officer - 2025 BJSC Office Assistant - 2026 PMG Chattogram Postman - 2026 Bangladesh Post Khulna Multiple Posts - 2026 MoIB Assistant Information Officer - 2026 8th NTRCA Assistant Head - 2026 BSCIC Technical Officer - 2026 GTCL Technician - 2023 গণিত 2021 ত্রিভুজের তিন বাহু দেওয়া থাকলে ক্ষেত্রফল

683

ব্যাখ্যাঃ

দেওয়া আছে, ত্রিবুজের বাহুগুলোর দৈর্ঘ্য যথাক্রমে

a= 20 মি, b = 21 মি এবং c = 29

অর্ধপরিসীমা s= a+b+c/2

=20+21+29/2

=70/2

=35

আমরা জানি, ত্রিভুজের ক্ষেত্রফল,

√s(s-a)(s-b)(s-c)

= √35(35-20)(35-21)(35-29)

=√35×15×14×6

=√44100

=210 বর্গমিটার

Hasibul

2 years ago

MCQ: 36 CQ: 15

Practice

ত্রিভুজের তিন বাহু দেওয়া থাকলে ক্ষেত্রফল

ত্রিভুজের তিন বাহু দেওয়া আছে :

মনে করি, △ABC এর BC = a, CA = b এবং AB = c । এর পরিসীমা 2s = a + b + c l AD ⊥ BC আঁকি।

ধরি, BD = x তাহলে, CD = a - x

△ABD এবং △ACD সমকোণী।

আবার,

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শিক্ষকদের জন্য বিশেষভাবে তৈরি

১ ক্লিকে প্রশ্ন, শীট, সাজেশন ও
অনলাইন পরীক্ষা তৈরির সফটওয়্যার!

শুধু প্রশ্ন সিলেক্ট করুন — প্রশ্নপত্র অটোমেটিক তৈরি!

প্রশ্ন এডিট করা যাবে

জলছাপ দেয়া যাবে

ঠিকানা যুক্ত করা যাবে

Logo, Motto যুক্ত হবে

অটো প্রতিষ্ঠানের নাম

অটো সময়, পূর্ণমান

প্রশ্ন এডিট করা যাবে

জলছাপ দেয়া যাবে

ঠিকানা যুক্ত করা যাবে

Logo, Motto যুক্ত হবে

অটো প্রতিষ্ঠানের নাম

অটো সময়, পূর্ণমান

অটো নির্দেশনা (এডিটযোগ্য)

অটো বিষয় ও অধ্যায়

OMR সংযুক্ত করা যাবে

ফন্ট, কলাম, ডিভাইডার

প্রশ্ন/অপশন স্টাইল পরিবর্তন

সেট কোড, বিষয় কোড

অটো নির্দেশনা (এডিটযোগ্য)

অটো বিষয় ও অধ্যায়

OMR সংযুক্ত করা যাবে

ফন্ট, কলাম, ডিভাইডার

প্রশ্ন/অপশন স্টাইল পরিবর্তন

সেট কোড, বিষয় কোড

এখনই শুরু করুন ডেমো দেখুন

৫০,০০০+

শিক্ষক

৩০ লক্ষ+

প্রশ্নপত্র

Notification

একটি ত্রিভুজের বাহুর দৈর্ঘ্য যথাক্রমে 20m, 21m ও 29m হলে, ক্ষেত্রফল কত?

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