What is the degree of 1 / 4 of a horizontal angle? What is the degree of 1 / 4 of a perimeter angle? What is the degree of 1 / 2 of a right angle? What is the angle

What is the degree of 1 / 4 of a horizontal angle? What is the degree of 1 / 4 of a perimeter angle? What is the degree of 1 / 2 of a right angle? What is the angle

The horizontal angle is 180 degrees, one fourth of which is 45 degrees, which is an acute angle;
The circumference is 360 degrees, one fourth of which is 90 degrees, which is a right angle;
A right angle of 90 degrees, one and a half times 135 degrees, is obtuse