The angles w and 80 are inscribed angles in the top left and bottom right corners respectively. They are opposite angles in this inscribed quadrilateral. Because they are opposite angles in the inscribed quadrilateral, they add to 180 degrees.
w+80 = 180
w+80-80 = 180-80
w = 100
Answer: Choice D
Answer:
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Step-by-step explanation:
I cant help with the last part sorry dont listen to my answer
A right angle has one 90° angle, and the sum of the angles of any triangle is always equals 360°.