Use the figure to name each of the following. H, I, J, and K Name a point with a capital letter. Introduction to Geometry: Points, Lines, and Planes PRE-ALGEBRA LESSON 9-1 a. four points b. four different segments c. five other names for KI d. five different rays, andOI, IO, OK, KO HOName a segment by its endpoints., HJ, KI, and OI IK Horizontal line KI has several names. The first letter names the endpoint.HO, OJ, KI, OK, and JH Quick Check 9-1

MP, OP, QT, ST MQ, NR, OS MN, NO, QR, RS You are looking directly down into a wooden crate. Name each of the following. Introduction to Geometry: Points, Lines, and Planes PRE-ALGEBRA LESSON 9-1 a. four segments that intersect PT b. three segments parallel to PT c. four segments skew to PT Quick Check 9-1

Draw two intersecting lines. Then draw a segment that is parallel to one of the intersecting lines. Introduction to Geometry: Points, Lines, and Planes PRE-ALGEBRA LESSON 9-1 Use the lines on notebook or graph paper. First draw two lines that intersect. Then draw a segment that is parallel to one of the lines. Quick Check 9-1

Introduction to Geometry: Points, Lines, and Planes PRE-ALGEBRA LESSON 9-1 Use the figure. Name each of the following. 1.four points 2.another name for EA 3.three different rays 4.three segments that are parallel to HG 5.four segments that are skew to CG 6.four segments that intersect AE A, B, C, D EQ AQ, AE, GR EF, DC, AB AB, AD, EF, EH 9-1

Angle Relationships and Parallel Lines PRE-ALGEBRA LESSON The Jackson County Bird Sanctuary has three times as many owls as hawks. It has 40 hawks and owls in all. How many of each are in the sanctuary? 30 owls, 10 hawks

Angle Relationships and Parallel Lines PRE-ALGEBRA LESSON 9-2 (For help, go to Lesson 7-5.) Solve. 1.n + 45 = x = y = 2y a + 15 = a + 45 Check Skills You’ll Need 9-2

Angle Relationships and Parallel Lines PRE-ALGEBRA LESSON 9-2 Solutions 1. n + 45 = x = 90 n + 45 – 45 = 180 – 4575 – 75 + x = 90 – 75 n = 135 x = y = 2y a + 15 = a y – 2y = 2y – 2y + 902a – a + 15 = a – a + 45 y = 90 a + 15 = 45 a + 15 – 15 = 45 – 15 a =

Find the measure of 3 if m 4 = 110°. Angle Relationships and Parallel Lines PRE-ALGEBRA LESSON 9-2 Replace m 4 with 110°.m ° = 180° Solve for m 3.m ° – 110° = 180° – 110° m 3 = 70° 3 and 4 are supplementary. m 3 + m 4 = 180° Quick Check 9-2

1 3, 2 4, 5 7, , 6 3 In the diagram, p || q. Identify each of the following. Angle Relationships and Parallel Lines PRE-ALGEBRA LESSON 9-2 a. congruent corresponding angles b. congruent alternate interior angles Quick Check 9-2

Angle Relationships and Parallel Lines PRE-ALGEBRA LESSON ° In the diagram, d e. 1.Find the m 5 if m 8 is 35°. 2.Name the congruent corresponding angles. 3.Name the congruent alternate interior angles. 1 5, 2 6, 4 8, ,