April 3, 2011 6:09pm UTC
Umm I think Its 60, if I know what you mean, if its a triangle. ( learned that if you press alt and 0176, it will give you the degree sign.
A triangle is 180°.
You take 40+80, and get 120.
So then you take 180-120, and get 60°.
April 3, 2011 7:47pm UTC
If your figure is triangle sum of angles must be 180°
April 3, 2011 8:18pm UTC
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