Consider a right triangle. One of the exterior angles 90 degrees.
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It is: 180-exterior angle = interior angle because there are 180 degrees on a straight line
Providing that it's a regular decagon then each exterior angle will measure 36 degrees
The measure of the exterior angle of a convex octagon is indeterminate.
The sum is always 360 degrees. Note, though, that when the interior angle is convex, the measure of the exterior angle is negative.The sum is always 360 degrees. Note, though, that when the interior angle is convex, the measure of the exterior angle is negative.The sum is always 360 degrees. Note, though, that when the interior angle is convex, the measure of the exterior angle is negative.The sum is always 360 degrees. Note, though, that when the interior angle is convex, the measure of the exterior angle is negative.
Each exterior angle measures 40 degrees