Get Connected with Your Child’s Math
January 8, 2008 by mooreloriehmsSee the 8th grade blog for RSVP form.
INTERESTING ITEMS:
January 8, 2008 by anndesherPhysics Carol: O Gravity, O Gravity,
All Newton’s theories crowning,
Where e’er we be, land, air, or sea,
We’re subject to your “downing”
Ornaments and Decorations
- Construct your own polyhedral paper ornaments for the tree.
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Make Your Own Geometric Space Forms! |
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| This is a geometric space forms called “polyhedra,” and we’re going to show you how to make one. It is made of triangles, and each triangle is called a “face.” The ”tetrahedron” has four faces. |
| Here is what you will need: * a compass * a straight edge (like a ruler, or even the edge of a book!) * paper (stiff paper makes a stronger space form) * scissors * glue, paste, or rubber cement * thread or yarn and paper clips (if you want to hang them) |
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Helpful Hints Before We Get Started: * To make perfect circles with a compass, place the point on the paper, hold the compass steady so that it doesn’t change size, and then spin the paper. * For each polyhedron, be sure that all the circles you draw are the same size.
| make a tetrahedron! | |
Tetra- means four, and -hedron means base. Tetrahedrons have four bases (or faces).
| 1. Draw a circle. | |
| 2. Place your compass point on the edge of the first circle and draw another circle. | |
| 3. Place your compass point on an intersection and draw a third circle. | |
| 4. Draw line segments connecting all the intersections. (Use your straight edge. You can score the lines with a ballpoint pen.) | |
| 5. The four triangles will become the four faces of the tetrahedron. Mark three tabs with a T. (You’ll use the tabs to glue the edges of the triangles together.) You will not need the shaded sections. Carefully cut out around the white area–the four triangles and three tabs. | |
| Note: You may notice that you’ve used a whole sheet of paper to create a fairly small space form. If you want to make the largest possible tetrahedron out of one sheet of paper, you do not really need to draw three full circles on the paper. Open your compass wider and place it as shown so that your triangles and tabs still fit on the paper but unneeded portions of the circles get cut off. | |
| 6. After you have cut out your shape, fold carefully along each line. (If you draw your lines firmly with a ballpoint pen, that “scores” the paper so it is easier to fold. Also, it helps to lay your straight edge along the line as you are folding.) Fold the tabs down, too. Check to be sure that the point of one folded triangle meets up with the point of the triangle underneath it. Crease each fold with a fingernail or the side of a pen or pencil so that each fold is very crisp. | |
| If you are going to decorate your space form, it is easier to do this before you glue it. (Be sure to decorate the blank side, not the messy side with all of the curves and lines.) |
| 7. It’s time to glue! Be sure that the tabs are glued to the inside of the triangles so they don’t show. Glue one edge at a time. However, if you use rubber cement (outside, because the fumes are bad for you), there is an opposite trick for making a fast, strong bond: Put rubber cement on all of the tabs and on all of the edges which the tabs will be touching. Let all of the tabs and edges dry. Then stick the tabs to the edges. They’ll hold tight, instantly. |
8. Attach string and paperclip if hanging on a Christmas tree.
Exponents Test, December 16
December 10, 2007 by mooreloriehmsSemester Exam Study Guide
December 10, 2007 by mooreloriehmsPercent Problems
November 28, 2007 by mooreloriehmsChapter 4 Study Guide Solutions
November 26, 2007 by mooreloriehmsgeometry-chapter-4-review-solutions.doc
This study guide is for the Honors Geometry test on Thursday, November 29.
Compound Growth Worksheets
November 26, 2007 by mooreloriehmsHAPPY THANKSGIVING!
November 20, 2007 by anndesher
Thanksgiving Day JokesQ: If April showers bring May flowers what do May flowers bring? ————————————————————————- A turkey farmer was always experimenting with breeding to perfect a better turkey. His family was fond of the leg portion for dinner and there were never enough legs for everyone. After many frustrating attempts, the farmer was relating the results of his efforts to his friends at the general store get together. “Well I finally did it! I bred a turkey that has 6 legs!” The pro football team had just finished their daily practice session when a large turkey came strutting onto the field. While the players gazed in amazement, the turkey walked up to the head coach and demanded a tryout. Everyone stared in silence as the turkey caught pass after pass and ran right through the defensive line. When the turkey returned to the sidelines, the coach shouted, “You’re terrific!!! Sign up for the season, and I’ll see to it that you get a huge bonus.” “Forget the bonus,” the turkey said, “All I want to know is, does the season go past Thanksgiving Day?” Q: What’s the best dance to do on Thanksgiving? Q: Why can’t you take a turkey to church? |
End of Semester Information
November 19, 2007 by mooreloriehmsStudents will have three more major grades this semester: An end of unit project on Exponential Growth, and end of unit test on Exponential Relationships, and an end of semester exam on all three units that we have studied. The exam will be on December 10 and the unit test grade will come after that. A date for the end of unit project has not yet been decided.
