points lines planes. points create a point using the play dough at your group. what will it look...
TRANSCRIPT
POINTS LINES
PLANES
Points Create a point using the play dough at
your group.
What will it look like?What are the characteristics of the
point you made?
• Talk about these questions with your group and compare your points!
PointsTraits of Points:Points have no dimensionLike each one of you has a name,
points also need to be labeled!Points can be labeled with letters
• Use the whiteboards and Expos to Label your point.
A
Point A
LinesCreate a line using the play dough.
What are the characteristics of your line?
Compare your line with the other lines created in your group.
LinesTraits of a line:A line is one dimensionLines are represented with arrowheads
and run through at least two points.
What do the arrowheads mean?Can a line run through a single point?How do you think you should label your
line?
AB
LinesNow add the line you created to your white
board. Use the point you have already labeled and an additional point to create your line.
Use any two points on a line to name it.Ex:
Line m line AB line BA
m
PlanesWhat can you use to represent a plane?
Traits of a plane:Planes are two dimensionsPlanes are represented by a shape that
looks like a floor and it extends without end
How many points do you think a plane runs through?
Where will the points be located?
PlanesPlanes go through any three points that
are not on the same line.
Use your whiteboard and play dough to create a plane with labeled points.
Use the three points not on the same line to label your plane.
Ex: plane M plane ABC
More to Know about Points!
Collinear Points -points on the same line
Coplanar Points -points that lie on the same plane
Your turn: Create collinear points and coplanar points with your play dough!
Line Segment
A line segment has two endpoints and contains all points that lie in between
Create a line segment with your play dough and label it!
AB BA
A
B
Endpoint!
Ray A ray consists of an endpoint and all
points that lie on same side of endpoint.
A B
Endpoint C D
AC BD
What do you notice about labeling rays?
Create your own ray using the play dough and your white board!
Skew Lines
Skew lines are lines that do NOT intersect and are NOT coplanar.
Plane M contains Line g.
-This means Line g lies on Plane M.