shapely spider webs
DESCRIPTION
Shapely Spider Webs. The Math & Science Center. presents. By Susan L. Cerruti. Let’s Look at a REAL Spider Web. What shapes do you see?. THINK!. What We Know. A triangle has 3 sides and 3 corners. A square or rectangle has 4 sides and 4 corners. Same Thing, Different Name. line segment. - PowerPoint PPT PresentationTRANSCRIPT
Shapely Spider WebsBy Susan L. Cerruti
The Math & Science Centerpresents
Let’s Look at a REAL Spider Web
What shapes do you see?
THINK!
What We Know
A square or rectangle has 4 sides and 4 corners.A triangle has 3 sides and 3 corners.
Same Thing, Different Name
line segmentside
cornerangle
The Point Is…
A point is formed when two lines intersect.
TermsA line segment is_______________.the 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
line segmentangle
point
Find the points, line segments and angles of these shapes.
Let’s Look at How a Spider Spins a Web.
What do we see at each stage?
What shape is the web?
What shapes do we see inside of the web?
THINK!
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 WebCopy your shape onto the graph paper.Use the numbers on your geoboard and
recording sheet to help you.
x
xx
x0 1 2 3 4 5 6 7 8
876543210
0 1 2 3 4 5 6 7 8
876543210
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 70
This Side of the Triangle is 7 Inches Long.
0 1 2 3 4 5 6 7
7 in.Write your measurement along the line segment.
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!