In the diagram, AB = 12, DX = 2.5, and BX = 5. Find CD. ?

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Answer 1 · 2018-03-02T06:52:51

#CD=6#

taken from question
I assume that #angle CXD=angle AXB#

Now
#angle D=angle B=90°#
#angle CXD=angle AXB#

So #triangle ABX~~triangle CDX# (AA similarity)

#=>(CD)/(AB)=(DX)/(BX)#

#=>(CD)/(12)=(2.5)/5#

#=>(CD)/12=1/2#

#=>(CD)=12*1/2#

#=>CD=6#
Hope it helps