Three intersection points, two of them between an interior angle bisector and the opposite side, and the third between the other exterior angle bisector and the opposite side extended, are collinear.
22.
For example, for ordinary convex and concave polygons " k " = 1, since the exterior angle sum is 360? and one undergoes only one full revolution walking around the perimeter.
23.
This result, which depends upon Euclid's parallel postulate will be referred to as the " High school exterior angle theorem " ( HSEAT ) to distinguish it from Euclid's exterior angle theorem.
24.
This result, which depends upon Euclid's parallel postulate will be referred to as the " High school exterior angle theorem " ( HSEAT ) to distinguish it from Euclid's exterior angle theorem.
25.
In a triangle, three intersection points, two of them between an interior angle bisector and the opposite side, and the third between the other exterior angle bisector and the opposite side extended, are collinear.
26.
And each supplementary to the interior angle ) has a measure of \ tfrac { 360 } { n } degrees, with the sum of the exterior angles equal to 360 degrees or 2? radians or one full turn.
27.
The sides of the triangle emanating from the North Pole ( great circles of the sphere ) both meet the equator at right angles, so this triangle has an exterior angle that is equal to a remote interior angle.
28.
Any polygon must have at least three convex angles, because the total exterior angle of a polygon is 2?, the convex angles contribute less than ? each to this total, and the concave angles contribute zero or negative amounts.
29.
Some authors refer to the " High school exterior angle theorem " as the " strong form " of the exterior angle theorem and " Euclid's exterior angle theorem " as the " weak form ".
30.
Some authors refer to the " High school exterior angle theorem " as the " strong form " of the exterior angle theorem and " Euclid's exterior angle theorem " as the " weak form ".
