Name______Date______
LESSON 1.4
Practice A
Write three names for the angle shown. Then name the vertex and sides of the angle.
1.
2.
3.
Classify the angle with the given measure as acute, obtuse, right, or straight.
4. mÐA = 115°
5. mÐA = 85°
6. mÐA = 90°
7. mÐA = 170°
Use a protractor to find the measure of the given angle. Then classify the angle as acute, obtuse, right, or straight.
8. ÐDFE
9. ÐAFB
10. ÐCFE
11. ÐAFE
Give another name for the angle in the diagram. Tell whether the angle appears to be acute, obtuse, right, or straight.
12. ÐLKJ
13. ÐJLK
14. ÐKJL
15. ÐMKL
16. ÐJML
17. ÐKMJ
Find the indicated angle measure.
18.
mÐPRS = __?__
19. mÐEFG = __?__
20. mÐWXZ = __?__
Use the given information to find the indicated angle measure.
21.
Given mÐADC = 135°, find mÐBDC.
22. Given mÐNRQ = 78°, find mÐPRQ.
Name______Date______
LESSON 1.4
Practice A continued
Given that bisects ÐWXY, find the two angle measures not given in the diagram.
23.
24.
25.
In each diagram, bisects ÐABC. Find mÐABC.
26.
27.
28.
29. Bridge In the bridge shown at the right, the measure of ÐFGH is 116° and bisects ÐFGH. What is the measure of ÐFGK?
30. Streets The diagram shows the intersection of three streets. The measure of ÐMPN is 55° and ÐLPN is a right angle. What is the measure of ÐLPM?
Answer Key
Lesson 1.4
Practice Level A
1. Ð DEF, Ð FED, and Ð E; vertex: E; sides: and
2. Ð JKL, Ð LKJ, and Ð K; vertex: K; sides: and
3. Ð QVS, Ð SVQ, and Ð V; vertex: V; sides: and
4. obtuse
5. acute
6. right
7. obtuse
8. 30°; acute
9. 50°; acute
10. 105°; obtuse
11. 180°; straight
12. ÐJKL; obtuse
13. ÐKLJ; acute
14. ÐLJK, Ð KJM, Ð MJK; or Ð J; acute
15. ÐLKM; right
16. ÐLMJ; straight
17. ÐJMK; obtuse
18. 123°
19. 56°
20. 64°
21. 86°
22. 23°
23. m ÐZXY = 39°, m ÐWXY = 78°
24. m ÐYXZ = 57°, m ÐYXW = 114°
25. m ÐWXZ = 73°, m ÐZXY = 73°
26. 44°
27. 86°
28. 116°
29. 58°
30. 35°