Question

what is tu? tu = □

Explanation:

Step1: Apply Pythagorean theorem

In right - triangle $\triangle WTU$, $WU = 85$, $WT = 52$. Let $TU=x$. Then $x=\sqrt{85^{2}-52^{2}}$.

Step2: Calculate the value

$x=\sqrt{(85 + 52)(85 - 52)}=\sqrt{137\times33}=\sqrt{4521}=39$.

Answer:

39