1­1
Identify Points, Lines and Planes
1
2
Line AB (written as ____) and points A and B are used here to define the terms below. line
A
B
points
Segment The line segment AB, or segment AB, (written as ____) consists of the endpoints A and B and all points on AB that are _____ A and B.
Note that AB can also be named ______.
Segment
B
A
endpoints
Ray The ray AB (written as _______) consists of the endpoint A and all points on AB that lie on the same side of ____ as ____.
Note that AB and BA are ____________ rays.
Name the rays: A
B
A
B
Opposite Rays ­ If point C lies on AB between A and B, then CA and CB are opposite rays
A
C
B
3
1.) What is the intersection of 2 walls?
2.) What is the intersection of 2 walls and the ceiling?
3.) How many points determine a line?
4.) How many points determine a plane?
Y
X
W
V
Z
5.) Give another name for VX.
6.) Name all rays with endpoints W. 7.) The opposite rays with endpoint W are _______ and ________.
8.) Are VX and XV the same ray? Are VW and VX the same ray? Explain. 4
9.) Sketch a plane and 2 intersecting lines that intersect the plane at separate points.
10.) Sketch a plane and 2 intersecting lines that do not intersect the plane.
11.) Sketch a plan and 2 intersecting lines that lie in the plane.
5
Try this activity:
http://www.classzone.com/cz/books/geometry_2011
_na/resources/applications/animations/explore_learning/dswmedia/anm535/anm535.html
6
Homework:
p. 5/1, 3­11, 13­16, 23­26, 27­37 Odd, 47­57 Odd
7