Page 91 - Math Course 1 (Book 2)
P. 91
Geometry: Angles
Your Turn!
Use Algebra to Find Angle Measures
SIGNS
A rail road crossing sign forms congruent angles. In the f gure, ∠WVX ≌ ∠ZVY.
If ∠WVX = 7a + 13 and ∠ZVY = 10a – 20, f nd the actual measurements
of ∠WVX and ∠ZVY.
A. 11, 11
B. 90, 90
C. 80, 100
D. 80, 80
Answer
Skill Practice! Write another name for each angle.
9. ∠3 10. ∠4
11. ∠WTS 12. ∠2
Measure each angle and classify it as right, acute, or obtuse.
Name the vertex of each angle.
1. ∠4 2. ∠1
3. ∠2 4. ∠5 13. ∠NMP 14. ∠OMN
Name the sides of each angle.
5. ∠4 6. ∠5 15. ∠QMN
7. ∠STV 8. ∠1
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