I remember doing this last year but i dont know how to solve it

asked Sep 15, 2017 54.9k views

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The two triangles are similar (because the angle at the top is a right angle), so we have the proportion

(4)/(8)=(8)/(x)

$\rightarrow4x=8*8$

$\rightarrow4x=64$

$\rightarrow x=16$

Joernalctl answered Sep 20, 2017

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