An acute angle a, known cosa = 1 / 3, a is how many degrees of angle? Such as the title
A = 70.53 degrees
The difference between horizontal angle and obtuse angle is () angle
Acute angle
What angle is half of a horizontal angle, what angle is twice of a horizontal angle, and what angle is half of an obtuse angle
Come on
Half of a horizontal angle is a right angle, twice of a horizontal angle is a circumference angle, and half of an obtuse angle is an acute angle