Introduction to Geometry Points, Lines, and

Planes

PRE-ALGEBRA LESSON 9-1

Quick Check

a. four points

b. four different segments

c. five other names for KI

d. five different rays

9-1

Introduction to Geometry Points, Lines, and

Planes

PRE-ALGEBRA LESSON 9-1

You are looking directly down into a wooden

crate. Name each of the following.

a. four segments that intersect PT

b. three segments parallel to PT

c. four segments skew to PT

Quick Check

9-1

Introduction to Geometry Points, Lines, and

Planes

PRE-ALGEBRA LESSON 9-1

Draw two intersecting lines. Then draw a segment

that is parallel to one of the intersecting lines.

Use the lines on notebook or graph paper.

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

9-1

Angle Relationships and Parallel Lines

PRE-ALGEBRA LESSON 9-2

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

9-2

Angle Relationships and Parallel Lines

PRE-ALGEBRA LESSON 9-2

(For help, go to Lesson 7-5.)

Solve. 1. n 45 180 2. 75 x 90 3. 3y

2y 90 4. 2a 15 a 45

Check Skills Youll Need

9-2

Angle Relationships and Parallel Lines

PRE-ALGEBRA LESSON 9-2

Solutions 1. n 45 180 2.

75 x 90 n 45 45 180

45 75 75 x 90 75 n

135 x 15 3. 3y 2y

90 4. 2a 15 a 45 3y 2y 2y

2y 90 2a a 15 a a 45 y

90 a 15 45 a 15 15 45

15 a 30

9-2

Angle Relationships and Parallel Lines

PRE-ALGEBRA LESSON 9-2

Find the measure of 3 if m 4 110.

Quick Check

9-2

Angle Relationships and Parallel Lines

PRE-ALGEBRA LESSON 9-2

In the diagram, p q. Identify each of the

following.

a. congruent corresponding angles

b. congruent alternate interior angles

Quick Check

9-2

Angle Relationships and Parallel Lines

PRE-ALGEBRA LESSON 9-2

145

9-2