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I need help answering this question in the attachment.

 Feb 9, 2019
 #1
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Note that  triangles ADC and CDB are similar because  angle DAC = angle DCB and angle CDA = angle CDB

 

Thus....this implies that 

 

AD /DC = CD / DB

 

But AD = y     CD = h     and DB = x

 

Therefore

 

y / h =  h / x       and cross-multiplying we get that

 

xy = h^2

 

 

cool cool cool

 Feb 9, 2019

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