A polygon with any number of sides can have an exterior angle that is larger than the corresponding interior angle. However, a triangle is the only regular polygon where the exterior angle is larger.
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An equilateral triangle is the only polygon in which the exterior angle is larger than the interior angle. They are equal in a square and smaller in all regular polygons with more sides,
It is: 180-exterior angle = interior angle
A+:Squaretriangle* * * * *More like Z-.A square does not have a larger exterior angle than an interior one - they are both 90 degrees. The ONLY regular polygon with the required property is an equilateral triangle.
The interior angle and the exterior angle are supplementary. That's why you learned about supplementary angles ... or at least they were presented in class ... before polygons.
It is the regular equilateral triangle whose each exterior angle is 120 degrees