The right angle of a right-angle triangle, like all right angles, is 90 degrees or one quarter of 360 (a full circle). All the angles of any triangle will add up to 180 degrees.
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A right angle triangle has a pair of perpendicular lines that meet each other at 90 degrees.
A right angle has 90 degrees. The question is how many degrees does a right triangle have? All triangles have a total of 180 degrees, no matter how the degrees are split between the angles. Remember: a quadrilateral has 360 degrees, and a triangle, no matter what type, is half of a quadrilateral. 360 cut in half, or divided by two, is 180, no matter how you slice it!
A right angle triangle has no parallel sides
A right angle has 90 degrees.
There is 180 degrees in all triangles