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A right angle is a 90 degree angle. It can also be known as a square angle. The two edges of the angle are perpendicular to each other (which is a 90 degree angle)No. All three angles must add up to 180. If you have a right angle, the other two angles will each be less than 90 degrees (acute). If you have an obtuse angle, the other twoThe letter A has a triangle in it and its 3 interior angles add up to 180 degrees
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