Lengths OK and OG are also both radii. Angle GOH = \(180 - 2y\) (because angles in a triangle add up to 180°) Angle GOK = \(180 - 2x\) (because angles in a triangle add up to 180°) Angle JOH ...
A 180-degree angle means that there is no difference, which is fairly true for CRT and plasma screens. However, viewing angles differ between LCD and front and rear-projection screens. Horizontal ...
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