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1.2 Points, Lines, and Planes. Objective: Understand and use the basic terms and postulates of geometry. 1.2 Vocabulary. Point Line Plane Collinear Points Coplanar Space. Segment Ray Opposite Rays Postulate Axiom Intersection. Remember y = mx + b ?. Vocab Terms:. Vocab Terms:. - PowerPoint PPT Presentation
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1.2 Points, 1.2 Points, Lines, and Lines, and
PlanesPlanesObjective:
Understand and use the basic
terms and postulates of
geometry.
1.2 Vocabulary
– Point– Line– Plane– Collinear Points– Coplanar– Space
– Segment– Ray – Opposite Rays– Postulate– Axiom– Intersection
Remember y = mx + b ?
Vocab Terms:
Vocab Terms:
Or plane ABC
Or BA
or line l
Naming Points, Lines, and Planes
•How can you tell that the label P is naming a plane instead of a point?•Why is plane RQS not a valid name for the plane?•What point(s) do lines l and m have in common?
Compare and Contrast• How is naming a ray similar to naming a
line? How is it different?
Naming Segments and Rays
Can the three points shown on the line be used to name a plane? Explain.
Vocab Terms:
• Intersection: set of points the figures have in common
• Postulate or axiom: an accepted statement of fact
Postulate 1-1
Postulate 1-2
Postulate 1-3
Postulate 1-4
You Know How?