Math Resources ~ Geometry

Below this paragraph is a link to a Geometry PowerPoint I created several years ago. I came across it while reviewing my math materials and decided to share. I remember it took a L-O-N-G time to create. The PowerPoint may feel a little choppy because I went through and deleted the textbook-specific slides.

I also had my students create a foldable graphic organizer with formulas for their interactive notebooks. Since I couldn’t find the exact organizer that went with the slides, I also deleted those slides. Even with all the deleted slides, the PowerPoint still contains 116 slides with eight lessons. It is not locked, so it can easily be changed to meet your needs. 

Links to the Teaching Resources

• PowerPoint covering Perimeter, Area, and Volume 
• Cheez-It Printable to go with the above PowerPoint

 Geometry [Perimeter, Area, and Volume]

Here is a little more explanation for some of the activities that are included in the PowerPoint:

Slide #11 

Give each student 12 stick pretzels. Have them imagine the pretzels are sections of fencing. Have them “build” a fence for their puppy using the pretzels. Draw out the finished results on grid paper.

Slide #12

Use the same pretzels to make a different fence configuration. Draw out the finished results. Have students count the boxes inside the fence “area” to determine which fence gives the puppy the most space.

Slide #21-23 

I placed the students into small groups. Each group was given three different sizes of card stock: 6 by 6 inches, 7.5 by 4.5 inches, and 6.5 by 5.5. Each piece of card stock was to become a different greeting card. Students first folded each piece of card stock to open like a card. (I encouraged students to be creative with folding. Only one fold was allowed, but the finished card could be a triangle, have a front that was a different size than the back, etc.)  

First, students had to determine if folding the piece of card stock in different ways would give the card different perimeters. The challenge was to figure out which card would take the least amount of material to decorate if you added a decorative ribbon, lace, beads, etc., around the perimeters of the fronts of the cards. After calculating, students created greeting cards. Students enjoyed this.

Slide 42 

This is the Cheez-It area activity that has been around for years. Print the printable in the link above. Students place the Cheez-Its on the rectangle and square shapes to determine the area of each. NOTE: Cheez-Its are approximately one-inch square.

Slide 52 

Students really “see” why the area of a parallelogram is the same as the area of a rectangle if you have them cut the triangle off one end of the parallelogram and move it to the opposite side to turn the parallelogram into a rectangle.

Slide 58 

I teach in Tennessee, so comparing its shape to a parallelogram is interesting. You may want to delete this slide if you don’t live in Tennessee.

Slide 68 

This one is pretty self-explanatory. We constructed bridges out of Popsicle sticks. Students calculated the area of the sides and base. 

Here are some links to additional online resources for teaching geometry:

• Area and Perimeter Resources
• Perimeter Worksheets
  

 Are you looking for additional math resources? Each of these blog posts contains free math materials:

• Math Resources ~ Place Value
  
• Teaching Idea ~ Surface Area Experiment
  
• Geometry Bulletin Boards 
  
• Coordinate Grid Activities