Sum Of Angles Outside A Triangle. As you can see from the picture below if you add up all of the angles in a triangle the sum must equal 180. An exterior angle of a triangle is equal to the sum of the opposite interior angles.
Exterior angle theorem 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. An exterior angle of a triangle is equal to the sum of the two opposite interior angles. C d 180 a f 180.
An exterior angle of a triangle is equal to the sum of the opposite interior angles.
The exterior angle is 35 62 97. The sum of exterior angle and interior angle is equal to 180 degrees. For more on this see triangle external angle theorem. Microsoft word worksheet triangle sum and exterior angle doc author.
