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# 1.1 Points, Lines and Planes PowerPoint PPT Presentation

1.1 Points, Lines and Planes. CFU 3108.3.2. Remember you have 5 minutes to get started. Chapter 1 Define and place in your glossary. Line Line segment Point Plane Congruent Segment bisector Collinear Coplanar Precision Accuracy Ray. Angle bisector Perpendicular

1.1 Points, Lines and Planes

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## 1.1 Points, Lines and Planes

CFU 3108.3.2

Remember you have 5 minutes to get started.

### Chapter 1Define and place in your glossary.

• Line

• Line segment

• Point

• Plane

• Congruent

• Segment bisector

• Collinear

• Coplanar

• Precision

• Accuracy

• Ray

• Angle bisector

• Perpendicular

• Complementary Angles

• Supplementary angles

• Intersection

• Polygon

• Concave

• Convex

• Regular Polygon

• Polyhedron

• Vertex

### Objective and Standard

• Introduce proper conventions for naming points, lines and planes and identifying intersections of lines and planes.

• Recognize that a definition depends on undefined terms and on previous definitions.

• Describe the intersection of lines (in the plane and in space), a line and a plane, or of two planes.

• Develop the structures of geometry, such as lines, angles, planes, and planar figures, and explore their properties and relationships.

• Give precise mathematical descriptions or definitions of geometric shapes in the plane and space.

n

B

Y

T

A

X

Z

### Name Line & Plan

l

E

A

B

C

D

N

List two points to name line l

AB, BA, AC, CA, AD, DA, BC, CB, BD, DB, CD, DC

List three point names for plane N

ABE, ACE, ADE, BCE, BDE, CDE

### Draw Geometric Figures

• Lines GH and JK intersect at L for

• G(-1, -3), H(2,3), J(-3, 2) & K(2, -3)

• Point M is coplanar with these points but not collinear with GH or JK.

H

J

M

L

K

G

• Graph GH and JK and M

• Label the Intersection L

### Interpret Drawing

• How many planes in the figure?

• 4

• Name three points that are collinear

• D, B, G

• Are points G,A,B and E collinear?

• At what point do EF and AB intersect?

F

D

P

G

C

E

B

A

### Summarize

Objective: Introduce proper conventions for naming points, lines and planes and identifying intersections of lines and planes

### Assignment – Block Class

• Page 8, 14 - 46 even and 62, 64

• Page 9, 32 - 78 Even

Assignment – Honors Class