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kat224

I believe that because there are 180 degrees in a triangle, and ACB is a triangle, you can add up two of the angles and subtract that from 180. So
30+50=80 and 180-80=100, that mean the angle above angle 1 is 100. And since angle one and that angle 100 are vertical angles, angle 1 = 100

A triangle has three sides and one side equals 60.

So 60+60+60 is 180
50+30= 80
180-80= 100

If you want to check your answer and see if you are right, then do this:

100+80+ 180

So the answer is: 100



Hope that helped and I hope that didn't confuse you...


Have a wonderful day!!!

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