180-interior angle = exterior angle
If it's a regular polygon then: 360/number of sides = exterior angle
the hypotenuse is the exterior angle
180 - interior angle = exterior angle
Subtract it from 180
By dividing number of its sides into 360 will give you the exterior angle.
No, you cannot find the exterior angle before the interior because the interior angles can vary in many ways.
180 minus interior angle = exterior angle because there are 180 degrees on a straight line
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.
360 /each exterior angle
you add it all
Exterior angle+interior angle=180 degrees and 180-exterior angle=interior angle
Each interior angle: 140 degrees Each exterior angle: 40 degrees
Each exterior angle of a regular octagon measures 45 degrees