Sagot :
Answer:
The exterior angle theorem is Proposition 1.16 in Euclid's Elements, which states that the measure of an exterior angle of a triangle is greater than either of the measures of the remote interior angles. This is a fundamental result in absolute geometry because its proof does not depend upon the parallel postulate.
________________________________
- If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles.
________________________________
Example:
Find the values of x and y in the following triangle.
y + 92° = 180°
(interior angle + adjacent exterior angle = 180°.)
________________________________
Here's some examples of Exterior angle theorem: https://brainly.ph/question/16088856
________________________________