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Students created geometric solid models and their nets.  After selecting an example solid, students took a digital picture, imported into a document, and turned in the project electronically. Assignment guidelines

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Hexagonal Prism

The geometric solid in which we chose to do was a hexagonal prism. We chose this one mainly because we would receive an extra bonus point for doing it and because we found a shape that was an example of a hexagonal prism. We created the net by using a compass to first draw a circle, then we made the sides of the prism within the circle, we then drew rectangular sides from each of the edges, after that was all finished we cut out the prism and we had the net.

Our project meets the requirements because we have a net, the actual shape that it made, calculated the volume and surface area, took a picture by using the digital camera, and finally we found a shape that was a hexagonal prism. The difficulty in which we encountered was trying to get the full net to fit on the piece of tagboard by using the compass to draw a circle. Otherwise it was rather easy to construct. We would not do anything differently next time; we feel that this time went pretty smoothly. Improving this assignment would not be possible, because it is fine the way that it is!!!

Rectangular Prism

We decided to construct a rectangular prism, because it happened to be the easiest to put together. We created the net by meeting to requirements in length; we have four inches by seven inches. The length requirement was at least ten centimeters long. That was very easy to meet. It was sort of difficult to make the net that we were going to put together as a prism, due to the fact that we had to put flaps on certain edges so the assembly would be easier.

The project was put together very well. The only thing I would change would be that we could make prisms with cuter paper and more creative designs on the prism than just plain white tag board. So I would definitely change the tag board that we had to use to make the prism. I think that it would be a little more enjoyable if we could have made our designs to look exactly like a Kleenex box, per say. So it would be really cool if on the outside we got our own constructed prism to look exactly like the prism we brought in.



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Heptagonal Prism

My partner and I chose the heptagonal prism, not only to get an extra bonus point, but because we had a barn that looked exactly like a heptagonal prism. By bringing in the barn that would also allow us to receive another bonus point and because heptagonal prisms are cool looking prisms! We created the net of the prism first by determining how many sides we needed to fit onto the net. The next step was figuring out how big the measurements needed to be and how exactly we were going to make the net look like an un-folded prism. Our project meets all of Mrs.Kroon’s requirements. We have the net of our prism, the actual prism, with sides according to scale, and we also have a prime example of what our prism should look like.

One major difficulty we encountered while doing this project was we had forgotten to add another side to our prism! So we had to do a little backtracking. Another problem we had was making the prism sides even with the other ones. If my partner and I were to do this same project again, I think we would chose to do a rectangular prism; it would have been much simpler! The only thing we would change about this project would be to change the requirement about the size of the prism. Instead of giving us a set measurement, we should be allowed to chose the size we want to make our prisms.

Rectangular Prism

We chose to do a rectangular prism because we thought that it would be easier to find an everyday object that looks similar to it. Our net and prism were created out of tag board. We simply came up with a base of 5 inches by 7 inches and went from there. Our prism is also 4 inches high. To make our prism we used scotch tape and a little elbow grease.

Our project meets the requirements because it is neatly done, accurate, and very appropriate. The only difficulties we encountered was when it came time to tape the prism together. It took a lot of concentration and thinking. Next time I think we would most definitely want to try a prism that would challenge us a little more. There is nothing in this project we would change. It was interesting and fun!

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Pentagonal Prism

The reason we chose a pentagonal prism for our project is because it looked like a barn. We thought that it would be easy to take a picture of or build a barn to bring in as an example. We had to make a net for our pentagonal prism. We did that by taking a piece of poster-board and drawing a pentagon on it. Then we drew one rectangle on each side. These would later become the sides of the pentagonal prism. After that we drew another pentagon that was connected to one of the rectangles. When folded up, the net made a pentagonal prism.

A couple of the difficulties that we encountered were deciding on what prism to build, and meeting all of the requirements. Our project meets the requirements because we have a net, the model, the calculations, the example, the calculations for the model and the example, the hard copy of our word document, and the computerized version of the word doc. and the picture. Something that we would do differently is to set up more time for the project. When we take a quiz, a test, and have schoolwork in all of our other classes, it gets hard to find time for the project. The one improvement that we would make is to give students more time to work on the project in class.

 Triangular Prism

We picked triangular prism, because it was pretty easy and it also got us a good ole bonus point along with it. The net of the triangular prism was also very easy to make, we just took an example out of the book and went from there. Our project met all requirements that were needed and the measurements were 15 by 25 by 13cm. By saying that I mean that it is a prism and its net does fold up into a triangular prism like shown above.

We picked a barn or a replica of a certain type of barn as our example of a triangular prism. The top part of our barn as you see is in a shape of a triangular prism. This barn shown here has two parts in which a triangular prism appears. A triangular prism appear more than you might think in modern day life for example, houses, sheds all along highways show some kind of triangular prism. This project took a long time to do, but was worth it and I would not change anything about it.

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Geometry Project Chapter 7: Geometric Solids

Choose one of the following geometric solids:

rectangular prism


triangular prism (1 bonus point)

pentagonal prism (1 bonus point)

hexagonal prism (1 bonus point)

heptagonal prism (1 bonus point)

octagonal prism (1 bonus point)

Create a net for the construction of this solid. (minimum size 10 cm. per edge)

Construct a tagboard model of the geometric solid. Calculate the volume and surface area of your model. Document your calculations.

Find an everyday object in the shape of your model. One bonus point will be awarded if you bring the example to class.

Calculate the volume and surface area of this everyday shape. Document your calculations.


Use a digital camera to take a picture of your model and example object (in the same photo). Choose a neutral background for the picture.

Save the picture file (. jpg) on your home directory and on a floppy disk. The title of the file is yournamenameofsolid. Example: cindykroonpentagonalprism

Import the picture into a Word document. Re-size the picture to approx. 3x3 inches. Include two paragraphs in this document (see below). The title of the document is yournamenameofsolid. Example: cindykroonpentagonalprism

Save the document (. doc) on your home directory, and on a floppy disk.


1. Make a short presentation to the class discussing your project.

Submit two paragraphs about the project. Describe how you chose the geometric solid, and how the net was created. Explain how your project meets requirements. Also discuss in any difficulties you encountered. What would you do differently next time? How would you improve this assignment?

Turn in the following:



Calculations for model

Example (if possible), or picture of example

Calculations for example

Hard copy of your Word document (black and white OK)

Floppy disk with picture file (.jpg) and document file (.doc)

Evaluation: 30 pts.

Net (accurate design, to scale) 4 pts.

Model (accuracy and neatness of construction) 4 pts.

Model surface area and volume calculations (work must be shown) 4 pts.

Object (appropriate and creative) 4 pts.

Object surface area and volume calculations (work must be shown) 4 pts.

Communications 5 pts.

Technology 5 pts.

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