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Triangular Prism Base Template
This template is a pattern for the base of a triangular prism. Place the
template on a sheet of foam board. Using a pencil or ballpoint pen,
mark the position of the six dots by piercing the template. Remove
the template and connect the points with solid or dashed
lines, the same as on the template. Cut out the prism
along the outer solid line, using a serrated knife or
saw, making sure that your cuts are made
perpendicular to the base.
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Parallelogram Prism Base Template
Copyright © Wright Group/McGraw-Hill
This template is a pattern for the base of a parallelogram prism.
Place the template on a sheet of foam board. Using a pencil or
ballpoint pen, mark the position of the five dots by piercing the
template. Remove the template and connect the points with
solid or dashed lines, the same as on the template.
Cut out the prism along the solid line, using a
serrated knife or saw, making sure that
your cuts are made perpendicular
to the base.
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TA
T
TA
B
AB
TAB
TAB
B
TA
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Triangular Prism Template
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Unfolding Geometric Solids
If you could unfold a prism so that its faces are laid out as a set attached at their
edges, you would have a flat diagram for the shape. Imagine unfolding a triangular
prism. There are different ways that you could make diagrams, depending on how you
unfold the triangular prism.
Which of the following are diagrams that could be folded to make a triangular prism?
Write yes or no in the blank under each diagram.
1.
2.
3.
4.
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Faces and Bases
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Using Faces and Bases
The flat diagram formed from unfolding a prism so that its faces are laid out flat and
attached at their edges is called a geometric net. For a given prism, there are different
nets, depending on how you think about unfolding the prism.
1.
Cut out the figures on Math Masters, page 287. You and your partner will use
the figures to build nets for the prisms below.
2.
Take turns to select, draw, and place figures to form a net for a prism.
3.
The partner who places the figure that completes the net states the number of
faces and the number of bases. For example, if the net for a cube were
completed, the partner would say, “4 faces, 2 bases.” This ends the round.
4.
A partner can also block the completion of a net. In this case, the partner
would put down a figure that would prevent completing the net in the following
placement and say “block.” The blocked partner then has the opportunity to
complete the net by placing two figures and stating the number of faces and
bases. Again, this would end the round.
Example:
Student 2
Draw 2:
Student 1
Draw 3:
Student 2
Draw 4:
Student 1
Draw 5:
Student 1 states,
“3 faces, 2 bases.”
This ends the round.
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Student 1
Draw 1:
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4 3
Polygon Capture Pieces
B
H
J
O
C
N
M
A
D
F
L
494
E
P
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K
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Polygon Capture Property Cards
Time
1 2
4 3
There is
only one
right
angle.
There are
one or
more
right
angles.
All angles
are right
angles.
There are
no right
angles.
There is
at least one
acute
angle.
At least
one angle
is more
than 90ⴗ.
All angles
are right
angles.
There are
no right
angles.
All opposite
sides are
parallel.
Only one
pair of
sides is
parallel.
There are
no parallel
sides.
All sides
are the
same
length.
All opposite
sides are
parallel.
Some
sides have
the same
length.
All opposite
sides have
the same
length.
Wild Card:
Pick your
own side
property.
495
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Polygon Capture Property Cards
Angles
Angles
Angles
Angles
Angles
Angles
Angles
Angles
Sides
Sides
Sides
Sides
Sides
Sides
Sides
Sides
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1 2
4 3
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Polygon Capture Record Sheet
Round
Property
List Polygon Captured
Score
1
2
3
Copyright © Wright Group/McGraw-Hill
4
5
Total Score
497