well right angle is 90 degress or a perfect l a straight angle is 180 degress
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2 right angles
There are right angles, acute angles, obtuse angles, and straight angles.
It can have angles which are acute, right, obtuse or reflex. Not straight angles, though.
What is a 'Straight Angle'???? Perpendicular lines meet at 90 degrees ( right- angles).
The parallel postulate: "That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles."