Equation Freak

equationfreak.blogspot.com · Jul 11, 2015

Pythagorean Stacks


I absolutely love this post from great maths teaching ideas for a trigonometry-pile-up. However, I don't teach trigonometry in my 8th grade math classes but I do teach Pythagorean Theorem. I decided to make triangle stacks that cover this topic. The first unit for my Algebra students is Pythagorean Theorem. It isn't a topic we usually cover in Algebra but the students are eighth graders and they will be tested on this material so we will cover it at the beginning of the year. Toward the end of the school year I will use this activity with my Pre-Algebra students as well.


Silly students, don't look for answers here. You will not find them as I don't post answers that can be copied.
(The diagram is definitely not to scale.)
All of the answers are integers so I may use this in conjunction with the Pythagorean Triple lessons that I will be doing with the students. Students will place numbers in each of the triangles starting at the bottom so it will be easy to follow their work. They willstart at the bottom of the puzzle to find answers and work their way up to the top triangle to find the missing side. I plan to have the students place this in their interactive notebooks.
I can't tell you how many times I made this diagram. I thought it was perfect until the area where the green, blue, yellow and purple triangles intersect. I was 1 cm off, Yikes! So I adjusted the picture and hope you understand what it means. All in all I am very pleased with how it turned out. It will be interesting to see how it works with the two different groups of students. My concern is that it will be too easy for the Algebra kids but too hard for many of the Pre-Algebra kids. I'll let you know.
Click here to download the Pythagorean Theorem Stack worksheet.

Hope you all are enjoying your summer! School starts in one month for us. Too much planning to do and so little time. UGH!

Til next time, Jan
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