A reference angle is the positive angle less than 360 which is coterminal with the given angle. For a negative angle add 360 repeatedly until you gat an answer less than 360.
=370 + 360 = -10 -10 +360 = 350
A 90 degree angle is a right angle.
118 degree angle
A 22 degree angle is an acute angle
The supplementary angle to a 145 degree angle will be a 35 degree angle because 145 + 35 = 180.
Straight angle, which is 180 degree, obtuse angle, which is 179 degree to 91 degree, right angle, which is 90 degree, and acute angle, which is 89 degree to 1 degree.
60
The angle of reference is in the first quadrant, and 90 degrees angle is not in the quadrant.
5 degrees
29 degrees
It's a reflex angle
A 30 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
17 degrees is an acute angle because it's greater than 0 but less than 90 degrees.
This is a VERY important question and I am glad you asked it. First you have to remember that in drawing angles we think of 4 quadrants. Think of the XY plane - the first quadrant is where BOTH X and Y are positive. In the 2nd quadrant the X is negative and the Y is positive. In the 3rd quadrant the X and the Y are negative. In the 4th quadrant the X is positive and the Y is negative. Normally when we draw an angle we draw an angle less than 90 degrees. However, we can draw any angle we want from 0 to 360. However that angle can be represented by an angle less than 90 degrees in a certain quadrant. Take an angle like 120 degrees. That angle is the same as a 60 degree angle in the 2nd quadrant. A 210 degree angle is the same as a 30 degree angle in the 3rd quadrant. A 359 degree angle is the same as a 1 degree angle in the 4th quadrant. Those smaller angles are reference angles. This explanation would be better if I could insert graphs. I have attached a link to a picture. Alpha is the angle and Beta is the reference angle.
The complement of a 55 degree angle is a 35 degree angle
The reference angle for an angle with the measure of 175 degrees is 5 degrees
A 90 degree angle is a right angle.
118 degree angle