1. ## Triangle Help

PS - You can click on the picture to see it full size.

2. We have $\widehat{RQS}=\widehat{RSQ}=\alpha$

$\widehat{TSU}=\widehat{TUS}=\beta$

If we know both $\alpha$ and $\beta$ then we can find x. For this we have:

$\alpha+x+\beta=180^{\circ}$ and

$180^{\circ}-2\alpha+180^{\circ}-2\beta=90^{\circ}$

and we get $x=45^{\circ}$

But if we know just $\alpha$ (or just $\beta$) then we can't find x.