They mean that the expression to the left of the sign is greater than or less than (as appropriate) the expression to the right of the sign.
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Acute angles are greater than 0 but less than 90 degrees Obtuse angles are greater than 90 but less than 180 degrees Reflex angles are greater than 180 degrees but less than 360 degrees
195 is greater than 180, but less than 270 so it is in quad 3
Since the hypotenuse (denominator) is always greater than the opposite or adjacent side (numerator), the ratio will always be smaller than one.
Acute angles (less than 90 degrees) Obtuse angles (greater than 90 degrees) Right angles ( equal to 90 degrees)
it is due to the fact that the length of an inclined plane(effect arm) is greater than its vertical height(load arm).