A perpendicular line.
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A right angle has 90 degrees. A right angle is an angle that bisects the angle formed by the two halves of a straight line.
There are 90 degrees in a right angle There are 180 degrees on a straight line There are 360 degrees in a full circle
Draw a perpendicular line, then cross it with a horizontal line. Where the lines cross there are four right angles. Each angle measures 90 degrees and the total number of degrees is 360. By definition, any triangle will consist of a total of 180 degrees, no matter what the length of the legs. If the right angle consists of 90 degrees, then there cannot be another right angle in the triangle, because the 90 degrees still available must be split between the other two angles.
No, a right angle is 90 degrees. In fact it is exactly half of a line.
A straight angle is an angle that is 180 degrees exactly (a straight line). A right angle is 90 degrees (like the corners of a square.)