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ICSE Class 7 Answered

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Asked by dibroy12 | 11 Oct, 2018, 07:33: PM
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begin mathsize 16px style To space prove colon space angle BDC thin space equals space 1 half angle BAC In space triangle ABC comma space BC space is space extended space to space straight E. angle ACE space equals space angle straight A space plus space angle straight B space.... left parenthesis Exterior space angle space property right parenthesis 1 half angle ACE space equals space 1 half angle straight A space plus 1 half space angle straight B angle 1 space equals space 1 half angle straight A space plus 1 half space angle straight B space space space... left parenthesis straight i right parenthesis In space triangle BDC comma space BC space is space extended space to space straight E. angle 1 space equals space angle 3 space plus space angle straight D angle 1 space equals space 1 half angle straight B space plus angle straight D space space space... left parenthesis ii right parenthesis From left parenthesis straight i right parenthesis space and space left parenthesis ii right parenthesis comma space we space get angle straight D space equals space 1 half angle straight A rightwards double arrow angle BDC space equals space 1 half angle BAC end style
Answered by Yasmeen Khan | 12 Oct, 2018, 11:33: AM

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