4A Exploring Exterior Angles
For Exercises 1-4, find the angle measures.
1. m ABD
B
147
2. m2BDC
3. m2 BCD
Е С
118
4. m2 BCE
5. What is the sum of the measures of the exterior angles of the triangle?
For Exercises 6-9, find the angle measures.
6. m21
7. Mz2
38
8. m23
9. m24
35
10. What is the sum of the measures of the exterior angles of the triangle?
P
For Exercises 11-17, find the indicated values.
Q
(15x - 7)º
11. X =
R
12. m2 QSR
(7x-3)
(x2 - 13°
US
13. m2 QSU
14. m2 QRS
15. m2 SRT
16. m2 SQR
17. mzPQR
18. What is the sum of the measures of the exterior angles of the triangle?
19. Make a conjecture about the sum of the measures of the exterior angles of a triangle.
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Holt Geometry