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CBSE Class 9 Answered

AD is one of the diagonal of  quad. ABCD . AM and CN are  perpendiculars from A and C respectively on BD. Show that ar ( quad. ABCD ) = 1/2  BD X ( CN + AM )
Asked by Vikas | 16 Jan, 2018, 11:58: PM
answered-by-expert Expert Answer
 
begin mathsize 16px style Area space left parenthesis square ABCD right parenthesis equals straight A left parenthesis triangle ABD right parenthesis plus straight A left parenthesis triangle BCD right parenthesis space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 1 half BD cross times AM plus 1 half cross times BD cross times CN space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 1 half BD cross times left parenthesis AM plus CN right parenthesis end style
Answered by Rashmi Khot | 17 Jan, 2018, 09:34: AM

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