In the figure ABCD is a square. If the length of the square is 10 ft, then what will be the area of the triangle OCD?

গণিত বর্গক্ষেত্রের ক্ষেত্রফল Bangladesh Navy — Upper Division Assistant DYD Office Assistant - 2026 Bangladesh Navy — Upper Division Assistant - 2026 18th NTRCA - 2024 Bangladesh Railway – ALM (Grade-2) - 2024 DSHE – Computer Typist - 2023 CAAB – Various Posts - 2021 DCAO – Assistant Director - 2019 16th NTRCA College - 2019 BPO – Postal Operator - 2019 CGDF – Auditor - 2019 DSS House Parent cum Teacher - 2018 IFIC Asst. Officer - 2018 ATEO - 2017 13th NTRCA College - 2016 Agrani Senior Officer - 2015 12th NTRCA - 2015 Pre-Primary Teacher - 2014 Pre-Primary Teacher - 2013 Primary Head Teacher - 2012 DG Food FI/SI Food - 2011 CAG Auditor - 2011 5th BJS Preli - 2010 Primary Head Teacher - 2008 DIP Assistant Director - 2003 21st BCS Preli - 1999 20th BCS Preli - 1998

গণিত বর্গক্ষেত্রের ক্ষেত্রফল আয়তক্ষেত্রের ক্ষেত্রফল BAEC — Laboratory Attendant BAEC — Laboratory Attendant - 2026 DGFI Security Inspector (SI) - 2025 Primary Assistant Teacher - 2019 BR Booking Assistant - 2016 BMD Assistant Meteorologist - 2007 BPSC Assistant Director - 2006 MoLJPA Assistant Secretary (Drafting) - 2001

গণিত বর্গক্ষেত্রের ক্ষেত্রফল আয়তক্ষেত্রের ক্ষেত্রফল MPA Security Guard MPA Security Guard - 2026 DPDC – Complain Supervisor - 2025 DESCO – AE - 2023 TGTDCL – Technician/Sales Assistant - 2023 Karmasangsthan Officer - 2023 BR ASM - 2022 BREB – Assistant Enforcement Coordinator - 2019 PMO – Watcher Constable - 2019 DGFP Office Assistant - 2011 MoFA Administrative Officer - 2004

গণিত বর্গক্ষেত্রের ক্ষেত্রফল BPSC MoWR Assistant Director (Admin)

গণিত বর্গক্ষেত্রের ক্ষেত্রফল DYD Office Assistant DYD Office Assistant - 2026 Bangladesh Navy — Upper Division Assistant - 2026 18th NTRCA - 2024 Bangladesh Railway – ALM (Grade-2) - 2024 DSHE – Computer Typist - 2023 CAAB – Various Posts - 2021 DCAO – Assistant Director - 2019 16th NTRCA College - 2019 BPO – Postal Operator - 2019 CGDF – Auditor - 2019 DSS House Parent cum Teacher - 2018 IFIC Asst. Officer - 2018 ATEO - 2017 13th NTRCA College - 2016 Agrani Senior Officer - 2015 12th NTRCA - 2015 Pre-Primary Teacher - 2014 Pre-Primary Teacher - 2013 Primary Head Teacher - 2012 DG Food FI/SI Food - 2011 CAG Auditor - 2011 5th BJS Preli - 2010 Primary Head Teacher - 2008 DIP Assistant Director - 2003 21st BCS Preli - 1999 20th BCS Preli - 1998

গণিত বর্গক্ষেত্রের ক্ষেত্রফল PMG Northern Circle Rajshahi Postal Operator PMG Northern Circle Rajshahi Postal Operator - 2026 DLS – Office Assistant Cum-Computer Typist - 2025 NBR – Data Entry / Control Operator - 2025 EGCB – Assistant Engineer - 2024 DSHE Accounts Assistant - 2023 BPO – Postal Operator - 2023 CPGCBL – Sub-Assistant Engineer - 2023 Combined Bank Senior Officer - 2023 Primary Teacher (Phase 1) - 2022 Biman – Ground Service Assistant - 2022 DYD AUYDO - 2022 DYD Cashier - 2022 CAAB – Assistant Security Officer - 2021 BBS – Thana Statistician - 2020 DNC – Sub-Inspector - 2019 MOFA – Personal Officer - 2019 BR SAE (Bridge) - 2018 RAKUB Officer (Cash) - 2015 32nd BCS Preli - 2012