30 degree angle
Yes.
The takeoff for a 30 degree angle will depend with the offset angle.
Yes and they are both acute angles
a 60-degree angle
staircase is made in an angle of 20 to 30 degree and it shouldn't be more then 30 degree.
If you bisect a 30 degree angle, you end up with two 15 degree angles.
A 30 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
A 60 degree angle
15 degrees. A bisected 60 degree angle makes 2 30 degree angles by definition of an angle bisector, then a 30 degree angle makes 2 15 degree angles by definition of an angle bisector.
the sine of a 30 degree angle is 0.5
the 30 degree angle is near the equator and the 90 degree angle is near the trop of Capricorn and cancer