A 65 degree angle is acute.
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The angle of 65 degrees is classified as an acute angle, meaning it is less than 90 degrees. It falls within the range of 0 to 90 degrees on the standard unit circle. In trigonometry, this angle can be used to calculate various values such as sine, cosine, and tangent.
an acute angle
It is: 360-80-120-65 = 95 degrees which is the 4th angle
For an angle, ?, the cotangent (or cot) of the angle is given bycot ? = 1/tan ?If ?=65
Not too sure of your question but if one angle measures 115 degrees then the other 3 angles are 115 degrees, 65 degrees and 65 degrees because opposite angles are equal.
A pair of supplementary angles total 180 degrees. In this instance, the supplement to a 65 degree angle would be 180 - 65 = 115 degrees.