কোনো ত্রিভুজের তিনটি বাহুকে বর্ধিত করলে উৎপন্ন বহিঃস্থ কোণ তিনটির সমষ্টি কত হবে?

ATEO PTI Instructor BCS 32nd BCS Preli - 2012 DPE Primary Head Teacher - 2012 NTRCA 11th NTRCA College - 2014 13th NTRCA - 2016 11th NTRCA - 2014 PSC MoLJPA Sub-Registrar - 2012 MoPA Assistant Director - 2016 DSS Social Service Officer - 2010 Primary Teacher Primary Assistant Teacher - 2018 DIP Assistant Director - 2007 Primary Education Officer - 2016 DOE Assistant Director/Research Officer - 2007 PTI Instructor - 2016 BD Post Estimator - 2018 SBC – Upper Division Assistant - 2019 DTE – Accountant - 2021 MOR – Office Sohayak - 2021 CAAB – Various Posts - 2021 CAAB – Senior Officer - 2021 DG Food – SI of Food - 2021 DG Food – UDA - 2021 BRDB URDO - 2022 Pre-Primary Teacher - 2013 Primary Assistant Teacher - 2008 PMG Khulna – Mail Operator - 2023 BR – Wayman - 2023 LGED – Work Assistant - 2023 BREB – Meter Reader-cum-Messenger - 2023 BREB – Assistant Junior Engineer - 2023 PLI East Zone – PLI Accountant - 2023 BR – Ticket Collector - 2024 18th NTRCA - 2024 PGCB – Junior Accounts Assistant - 2024 GrameenBank Grameen Officer - 2025 BAEC – Computer Typist - 2025 Primary Assistant Teacher - 2026 BPSC Fisheries Survey Officer - 2026 BUET GTCL Technician - 2023 গণিত 2016 ত্রিভুজের বহিঃস্থ ও অন্তঃস্থ কোণ (Exterior angles and interior angles of a triangle)

 ত্রিভুজের  তিনটি বাহু বর্ধিত করলে যে বহিঃস্থ তিনটি কোণ উৎপন্ন হয় তাদের সমষ্টি ৩৬০ ডিগ্রী । এখানে 
$$\begin{gathered} \angle p+\angle q +\angle r=180° \\ \angle x+\angle y+\angle z=180° \\ -\angle q+180°-<r \\ =540° -(\angle p+\angle q+\angle r) \\ =540°-180° \\ =360° \end{gathered}$$