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CBSE Class 9 Answered

Please solve question no 6 with proper explanation 
Asked by adityaahuja099 | 20 Nov, 2017, 07:48: PM
answered-by-expert Expert Answer
begin mathsize 16px style From space the space given space diagram space angle DEC equals 90 degree space space space space space space space space space space space space Angle space inscribed space in space straight a space semi minus circle also space angle DCE equals 40 degree In space increment DEC comma angle DEC plus angle CDE plus angle DCE equals 180 degree 90 degree plus angle CDE plus 40 degree equals 180 degree angle CDE equals 180 degree minus 130 degree angle CDE equals 50 degree equals angle ODB Given space that space angle AOD equals 75 degree angle AOD plus angle AOC equals 180 degree space space space space space space space space space space space space space Angles space are space in space semi minus circle rightwards double arrow angle AOC equals 180 degree minus 75 degree rightwards double arrow angle AOC equals 105 degree rightwards double arrow angle AOC equals angle DOB space equals 105 degree space space space space space space Vertically space opposite In space increment DOB comma angle DOB plus angle ODB plus angle OBD equals 180 degree 105 degree plus 50 degree plus angle OBD equals 180 degree angle OBD equals 25 degree angle OBD equals angle OEB equals 25 degree end style
Answered by Sneha shidid | 30 Nov, 2017, 09:57: AM

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