The exterior angle of a triangle is equal to the sum of its two opposite interior angles, which are not adjacent. This theorem states that when a triangle’s side is extended, the resultant exterior angle formed is equal to the sum of the measures of the two opposite interior angles of the triangle. The exterior angle of a triangle can be calculated using various formulas depending on the other.
The exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles of the triangle. When a triangle’s side is extended, the resultant exterior angle formed is equal to the sum of the measures of the two opposite interior angles of the triangle. The measure of an exterior angle (our w) of a triangle equals to the sum of the measures of the two remote interior angles (our x and y) of the triangle.
There are three basic properties of the exterior angles: the measure of an exterior angle is equal to the sum of the measures of the two non-adjacent interior angles. The exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.
In summary, the exterior angle of a triangle is equal to the sum of its two opposite interior angles, which are not adjacent. To find the unknown exterior angle of a triangle and prove that the sum of its exterior angles is 360°, one must first identify the measures of the two interior angles opposite the exterior angle in question.
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