Points, Lines, and Planes
The applet below shows a two-dimensional and three-dimensional model of the same points, lines, and planes. Spend a couple minutes exploring the objects and how they interact with each other when you move them. Then answer the questions below.
Name three non-collinear points.
D, E, H
H, B, K
A, C, F
Name the line containing point E.
[math]\longleftrightarrow\longleftrightarrow\longleftrightarrow\longleftrightarrow\longleftrightarrow\longleftrightarrow[/math][br][math]AE,BE,EA,EB,AB,BA[/math]
Line CG intersects Line AE at _________.
B or point B
Line FJ and Line GK intersect at _______.
C or point C
Two lines intersect at ______.
a corner
a plane
a point
a line
What is the difference between a line and a line segment?
A line continues forever in opposite directions. It cannot be measured, only described by its location (equation).
Name two line segments contained in Line AB?
Segment AB, Segment BA, Segment AE, Segment EA, Segment BE, Segment EB
How do we name a plane? Give one name for the plane shown in grey.
We name a plane using three non-collinear points. Names will vary but must include points from at least two lines. EX: Plane CGE or Plane CGF
Which lines are coplanar? (select all)
[math]\longleftrightarrow[/math][br]AB
[math]\longleftrightarrow[/math][br]HK
[math]\longleftrightarrow[/math][br]EG
[math]\longleftrightarrow[/math][br]FC
[math]\longleftrightarrow[/math][br]DB
A line intersects a plane at _______.
a line
a plane
a point
a corner
Two planes intersects at ______.
a line
the airport
a point
a plane
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Information: Points, Lines, and Planes