chapter 1.1 building your geometry portfolio. “undefined” terms point – an exact location line...
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Chapter 1.1
Building Your Geometry Portfolio
“Undefined” TermsPoint – an exact locationLine – never ending straight path Segment – 2 endpoints and all the points betweenRay – never ending path in ONE directionAngle – 2 rays with a common endpointPlane – never ending flat surface
Point
Represented by: a dot
Labeled with: Capital Letter
Written Notation: point A or A
• A• C
• B
Represented by: a line with arrows at each end
Labeled with: 2 Capital Letters or a lower case cursive letter
Written Notation:
Line
l•
•
A
B
Line l AB
Segment
Represented by: 2 dots and a connecting line
Labeled with: 2 Capital Letter
Written Notation: AB
•
•
A
B•
•
C
D
Ray
Represented by: an endpoint and an arrow
Labeled with: 2 Capital Letters
Written Notation: FG ML
F
G
M
L• •
Angle
Represented by: 2 rays
Labeled with: 3 points or the vertex
Written Notation: <F, <HFG, or <GFH
The Vertex is the common endpointThe Sides are the rays
F
G•
• H
PlaneRepresented by: a parallelogram
Labeled with: Capital Cursive Letter or 3 non-colinear points
Written Notation: plane N or
M N LM
Other terms
Intersect – lines, planes, lines & planesCollinearNon-collinearCoplanarNon-coplanarMidpoint