there are an infinite amount of angle that measure less than 90 degrees; however, there are only 89 whole angles that measure less that 90.
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Obtuse angles measure in degrees more than 90 snd less than 180.
It is not a requirement that any of the angles are right angles (90 degrees), to qualify as a parallelogram.
it depends on the angle. Right angles always have 90 degrees. You can use a protractor to measure the angle
anything less than 90 degrees
A formula for this question is that the total measure of the interior angles of a polygon is 180 degrees multiplied by 2 less than the number of sides. For a seven sided polygon, this formula yields 180 X 5 = 900 degrees.