Please help me learn how to do something?

Question

cydney_morgan · Answer

What is the measure of angle m<EFG?

(pic below)

 thirty degrees

 forty degrees

 seventy degrees

 one hundred ten degrees

cydney_morgan · Answer

I do not know how to do this, and rather than giving me the answer, I would really like to learn how to get it my self so I can do the rest by my self ^-^

cydney_morgan · Answer

It's confusing me :/

anonymous · Answer

$$30+40+x+70=180$$ reading clockwise  where $x$ is that unlabelled angle

anonymous · Answer

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anonymous · Answer

you can solve that equation for $x$ easily enough, you get 
$$x+140=180\
x=40$$

cydney_morgan · Answer

But how did you come to that conclusion? I'm confused. >.< I'm sorry your not a bad teacher, I'm just confused on how you did that.

anonymous · Answer

oh because they make a line

anonymous · Answer

|dw:1407610396253:dw|

cydney_morgan · Answer

|dw:1407610408674:dw|

This line?