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CBSE Class 9 Answered

prove that the bisector of two adjacent supplementory angles from a right angle
Asked by sbidipak | 27 Jun, 2017, 04:56: PM
answered-by-expert Expert Answer
begin mathsize 16px style angle DBA plus angle EAB equals 180 degree space space space space space space space CB comma space CA space are space bisectors space of space angle DBA comma space angle EAB space respectively angle DBC equals angle CBA equals 1 half angle DBA......... left parenthesis straight i right parenthesis angle EAC plus angle CAB equals 1 half angle EAB.. left parenthesis ii right parenthesis angle DBA plus angle EAB equals 180 degree Using space left parenthesis straight i right parenthesis space and space left parenthesis ii right parenthesis 2 angle CBA plus 2 angle CAB equals 180 degree angle CBA plus angle CAB equals 90 degree In space increment BAC comma angle BAC plus angle ACB plus angle ABC equals 180 degree angle BAC plus 90 degree equals 180 degree angle BAC equals 90 degree the space bisectors space of space two space adjacent space supplementary space angles space include space straight a space right space angle. end style
Answered by Sneha shidid | 27 Jun, 2017, 06:09: PM

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CBSE 9 - Maths
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