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.mA = 115°

5.mA = 85°

6.mA = 90°

7.mA = 170°


Use a protractor to find the measure of the given angle. Then classify the angle as acute, obtuse, right, or straight.

8.DFE

9.AFB

10.CFE

11.AFE

Give another name for the angle in the diagram. Tell whether the angle appears to be acute, obtuse, right, or straight.


12.LKJ

13.JLK

14.KJL

15.MKL

16.JML

17.KMJ

Find the indicated angle measure.

18.
mPRS = __?__

19.mEFG = __?__


20.mWXZ = __?__


Use the given information to find the indicated angle measure.

21.
Given mADC = 135°, find mBDC.

22.Given mNRQ = 78°, find mPRQ.


Name______Date______

LESSON 1.4

Practice Acontinued

Given that bisects WXY, find the two angle measures not given in the diagram.

23.

24.

25.

In each diagram, bisects ABC. Find mABC.

26.

27.

28.

29.Bridge In the bridge shown at the right, the measure ofFGH is 116° and bisects FGH. What is the measure of FGK?


30.Streets The diagram shows the intersection of three streets. The measure ofMPN is 55° and LPN is a right angle. What is the measure of LPM?

Answer Key

Lesson 1.4

Practice Level A

1.DEF, FED, and E; vertex: E; sides: and

2.JKL, LKJ, and K; vertex: K; sides:and

3.QVS, SVQ, and  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.JKL; obtuse

13.KLJ; acute

14.LJK, KJM, MJK; or J; acute

15.LKM; right

16.LMJ; straight

17.JMK; obtuse

18.123°

19.56°

20.64°

21.86°

22.23°

23.mZXY = 39°, m WXY = 78°

24.mYXZ = 57°, m YXW = 114°

25.mWXZ = 73°, m ZXY = 73°

26.44°

27.86°

28.116°

29.58°

30.35°