The sum of the measures of two exterior angles of a triangle is 255°. What is the measure of the third exterior angle?
1 answer:
You might be interested in
Answer:
See explanation
Step-by-step explanation:
Q11. Statement Reason
1. bisects
Given
2. Definition of angle bisector
3. Reflexive property
4. bisects
Given
5. Definition of angle bisector
6. ASA postulate
Q13.
1. Consider triangles ACB and DCE. In these triangles,
- given;
- given;
- as vertical angles (by vertical angles theorem)
Hence, triangles ACB and DCE are congruent by SAS postulate.
2. congruent triangles have congruent corresponding sides, so