If you have used the data to estimate one parameter then you would use n-1. If two parameters, then n-2.
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360* degrees, as they have four sides and so 90x4 or any other combination for a non square shape. Triangles have 180* degrees but ALL quads have 360* degrees... hope that helped answer your question.
If an operation calls for multiplication we multiply; if it calls for any other operation, we perform the other operation!
When straight lines are perpendicular to each other they create right angles of 90 degrees
The data sets determine the degrees of freedom for the F-test, nit the other way around!
The given question is known as an 'ambiguous case' in trigonometry and by using the sine and cosine rules in trigonometry its other angles are 66.82 degrees and 63.18 degrees with a 3rd side of 29.13cm or its other angles are 16.82 degrees and 113.18 degrees with a 3rd side of 9.44cm.