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ICSE Class 9 Answered

Ols answer me question no. 14,15,16,17  
question image
Asked by NI Schay | 12 Aug, 2018, 06:46: AM
answered-by-expert Expert Answer
begin mathsize 16px style 14. space First space draw space the space diagram space according space to space the space question comma
AB squared space equals space BD squared space plus space AD squared
rightwards double arrow BD squared space equals space AB squared space minus space AD squared
AB space equals space AC space
so comma space AB squared space equals space AC squared
rightwards double arrow BD squared space equals space AC squared space minus space AD squared
rightwards double arrow BD squared space minus space CD squared equals space AC squared space minus space AD squared space minus space CD squared
Here comma space AC thin space equals space AD thin space plus space CD space
so comma space space AC squared equals space left parenthesis AD thin space plus space CD right parenthesis squared space
rightwards double arrow AC squared equals space AD squared thin space plus space CD squared space plus space 2 space CD space cross times space AD
since comma space BD squared space minus space CD squared space equals space space AC squared space minus space AD squared space minus space CD squared
rightwards double arrow BD squared space minus space CD squared space equals space space AD squared space plus space CD squared space plus space 2 CD cross times space AD minus space AD squared space minus space CD squared
rightwards double arrow BD squared space minus space CD squared space equals space 2 CD cross times space AD end style
Answered by Yasmeen Khan | 16 Aug, 2018, 11:42: AM
ICSE 9 - Maths
a
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