The answer is 100°
A parallelogram is any four sided shape with two pairs of opposite parallel and equal length sides. It is safe to say that a square is a parallelogram and not the other way round.
To explain how we got to 100 degrees, I have attached an image.
Based on the image attached, the opposite angles are equal. The adjacent angles are supplementary. With this in mind, the supplement of 80° will be 100°
Answer= background
Appearance of the laptop is called theme, it is also related to background
<span>At mine site of Rijckholt in the Neatherlands, archaeologists ...
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To protect from attackers gaining access by sitting on a certain configuration too long.