# Math Help - Measure of marked Angle

1. ## Measure of marked Angle

My finals are tomorrow and I'm having trouble solving this problem. If someone will, help! Here's the link.

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2. ## Re: Measure of marked Angle

Originally Posted by HellBunny
My finals are tomorrow and I'm having trouble solving this problem. If someone will, help! Here's the link.

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Together they make a straight line. A straight line has \displaystyle \begin{align*} 180^{\circ} \end{align*}, so

\displaystyle \begin{align*} 3x + x &= 180^{\circ}\\ 4x &= 180^{\circ} \end{align*}

I'm sure you can go from here.

3. ## Re: Measure of marked Angle

Answer is 45 degrees, but here's the problem. My answer sheet says 45 and 135. So sorry, just realized what to do, thanks a lot! points to you.