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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.

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13y ago

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