What is the relationship between one interior angle and its exterior angle?
1 Answer
Aug 18, 2016
Sum of an interior angle of a triangle and its exterior angle is
Explanation:
Interior angle is formed by two sides of a polygon.
The corresponding exterior angle is formed by one of these sides and continuation of another (see the drawing.)
That makes these two angles adjacent to each other and together forming a straight angle of
Therefore, these two angles are supplementary and, added up, make