No.
An octagon is a 2-dimensional closed polygonal shape: it is NOT an angle.
Yes
An angle greater than 90 degree is an obtuse angle.
A 30 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
An obtuse angle is greater than 90 degrees but less than 180 degrees
A 6 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
Yes
An angle greater than 90 degree is an obtuse angle.
A 30 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
An obtuse angle is greater than 90 degrees but less than 180 degrees
A 2 degree angle is an acute angle because it is greater than 0 but less than 90 degrees
A 6 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
A 60 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
A 54 degree angle is an acute angle because it is greater than 0 but less than 90 degrees
A 77 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
A 60 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
an angle of a degree greater than ninety
A 5 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.