Transcript Shapely Spider Webs PRINT VERSION

The Math & Science Center
presents
Shapely Spider Webs
By Susan L. Cerruti
Let’s Look at a REAL Spider Web
THINK!
What shapes do you see?
What We Know
A triangle has 3 sides and 3 corners.
What We Know
A square or rectangle has 4 sides and 4 corner
Same Thing, Different Name
side
Same Thing, Different Name
line segment
Same Thing, Different Name
line segment
corner
Same Thing, Different Name
line segment
angle
The Point Is…
A point is formed when two lines
intersect.
Terms
_______________.
A line segment isthe
straight line
between two
points.
An angle ismade
_________________.
when two line
segments intersect at a
point.
this special point at an angle is called a VERTEX
Let’s Put it Together
angle
line segment
point
Find the points, line segments and
angles of these shapes.
Let’s Look at How a Spider Spins a Web.
THINK!
What do we see at each stage?
What shape is the web?
What shapes do we see inside of the
web?
The spider
begins with
one simple
LINE
SEGMENT.
These 3
LINE
SEGMENTS
form the 3
SIDES of a
triangle.
The same
LINE
SEGMENTS
also
intersect at
a POINT to
form
ANGLES.
The final
product—
what do we
see now?
Make Your Own Geoboard Web
Using Your Rubber Bands
THE RULES:
– 3 to 10 rubber bands
– no more than 2 rubber
bands on one point
– bands should not cross
– your shape must be
closed
Examples
Examples
Transfer Your Web
Copy your shape onto the graph paper.
Use the numbers on your geoboard and
recording sheet to help you.
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
0
0
0
1
2
3
4
5 6
7
8
x
x
x
0
1
2
3
4
x
5 6
7
8
Your Web
Find and count line segments.
Find and count points & angles.
Measure each.
Be Sure to Measure from the 0 on
Your Ruler!
0
1
2
3
4
5
6
7
This Side of the Triangle is 7
Inches Long.
Write your measurement
along the line segment.
7 in.
0
1
2
3
4
5
6
7
What Did We Learn?
What did you learn about your web?
What did you learn about points, line
segments and angles?
• Were they the same or different?
• Is there a pattern?
Thank You!