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Originally Posted by helloying thanks Cut off thetwo right triangles of the trapezium (see attachment)
Then you know (A) ........ and ........ (B)
According to my sketch you can see that
Solve the equations (A) and (B) for h and substitute (8-x) instead of y:
Solve for x. I've got and consequently and
I'll leave the rest for you.
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