It is a reflex angle which is greater than 180 degrees
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The largest angle in a triangle is opposite to its longest side
In a right angle triangle the hypotenuse is the largest side because it is opposite to the largest angle which is 90 degrees.
A isosceles right angle triangle will have 2 equal interior angles of 45 degrees and 1 angle of 90 degrees with its largest exterior angle being 180 -45 = 135 degrees.
90
A dodecagon