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I need to find AB.

 

 Aug 6, 2020
 #1
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By a geometric theorem (involving similar triangles):  CB · CA  =  CD · CL

--->     (7) · (7 + 2x + 3)  =  (9) · (9 + x + 1)

--->          (7) · (10 + 2x)  =  (9) · (10 + x)

--->                  70 + 14x  =  90 + 9x

...

find x; then find AB ...

 Aug 6, 2020

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