4.1 Exercises Do the exercises, and check your work. Objective 1: Identify Lines, Line Segments, and Rays 1) Explain the difference between a line segment and a ray. 2) Draw a picture of a vertical ray pointing downward. Name the ray. Identify each fi gure as a line, line segment, or a ray. Then name it using the correct notation. 3) T U 4) M N 5) M K 6) N P 7) U V 8) N P 9) J K 10) Z Y · 11) Draw a line named CT . ¡ 12) Draw a ray named RD . Objective 2: Identify and Classify Angles 13) What is an obtuse angle? 14) What is an acute angle? 15) What is a right angle, and how is it indicated when an angle is drawn? 16) What kind of angle has a measure of 180? Name each of the numbered angles in the fi gures in two different ways. 17) P T 4 18) Z 3 1 2 N U R T 1 3 2 4 D Y Q 19) 1 3 2 4 P T D W V 20) K 4 2 H 3 1 B A R 21) A B E C 4 2 3 1 D 22) S 2 4 3 1 G R N B Classify each angle as acute, right, obtuse, or straight. 23) T M L 24) P Y N 25) J 26) D 27) E B S 28) Q P R 29) F 30) L www.mhhe.com/messersmith SECTION 4.1 Introduction to Geometry 291
messersmith_power_prealgebra_1e_ch4_7_10
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