Question 585120: find the measures of an interior angle and an exterior angle of a regular triangle Found 2 solutions by richwmiller, Alan3354:Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! find the measures of an interior angle and an exterior angle of a regular triangle
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"regular" means all sides and all angles of a polygon are equal.
sides to sides, angles to angles.
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The sum of the angles of a triange is 180 degs
3*angle = 180, so
each interior angle = 60 degs
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Ext = 180 - Int = 120 degs
