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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.

- 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

- 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

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

- 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

- 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

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

- Page 8, 14 - 46 even and 62, 64

- Page 9, 32 - 78 Even

Assignment – Honors Class