Mentor Texts: The Greedy Triangle

This weeks topic for the Collaboration Cuties mentor text linky are math mentor texts. Here is the book that I'm highlighting this week:

The gist- There is a triangle that isn't satisfied being his shape. So like your everyday average shape-shifting triangle he changes, and changes, and changes until he is completely transformed.

This book was written by the author of the math textbook from one of my undergrad classes. She's written a few other children's books as well. My professor mentioned a lesson where he had the students in the class hold on to a rope and make the shapes that the triangle did throughout the book. This way the students could truly see the progression of the shapes: each time you add a side, you add an angle (until the angles are so large and the sides so small it's indistinguishable).

Be sure to link up! Happy reading :)


  1. I love this book! We both had geometry on the brain today. ;-)
    ideas by jivey

    P.S. Are you changing your layout?? I see nothing but the post when I opened the link from Collaboration Cuties' linky??

    1. OK, weird. When I posted my comment, it opened into your normal blog layout. But every time I click the link from the linky, it opens to a different page with just your post! Hm. :-/

    2. She linked it with an extra something on her url- I can fix that on my end! No worries!!

  2. Marilyn Burns is a math genius. Love this book - it is a great intro. This year it really got my kids thinking about the names of the shapes past 10 sides!

    Looking From Third to Fourth

  3. Too fun, I chose this book for this week too. Such a great book!
    Hunter's Tales from Teaching

  4. We will be preparing for state testing in two weeks and I think I will pull this book off my shelf to help review some geometry! Thanks for reminding about this book! I found your blog thru Collaboration Cuties linky and I'm your newest follower!


  5. I love everything from Marilyn Burns and this book is no exception! Thanks for sharing!!

    Mrs. Laffin's Laughings

  6. I love love love this book! I like the idea of using the rope- I have not heard of that before!! Great idea to get them involved in it!!

    Thanks for linking up!
    Collaboration Cuties

  7. This is a great idea! Don't forget that you'll be featured on my blog tomorrow!
    :) Dana
    Fun in 1st Grade


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