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90 degrees
Ah, let's create a happy little angle here. To find the reference angle for 550 degrees, we simply subtract 360 degrees from 550. So, 550 - 360 equals 190 degrees. That's your reference angle, a beautiful angle just waiting to bring some joy to your mathematical canvas.
a 90 degree angle is a perfect angle of a square so 80 degrees will be 10 degrees less.
90 - 80 = 10 degrees.
80 degrees is an acute angle because it is greater than 0 but less than 90 degrees