Math = Love: Angle Mazes by Naoki Inaba

Tuesday, January 24, 2017

Angle Mazes by Naoki Inaba

This summer, I blogged about a great number of logic puzzles created by Naoki Inaba (a Japanese puzzle maker) for use in math classrooms.  Most recently, I blogged about his Zukei Puzzles which many of you have used in your own classrooms.  After a twitter conversation today about Inaba's Angle Mazes, I decided to translate the rules to English and condense them into fewer pages since so many of you seemed to find that useful with the Zukei Puzzles!

Here is the instructions for the Angle Mazes as provided by Inaba.

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Inaba also provides an example of what not to do and what you should do.

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The first example will be incorrect if you continue following the arrow to complete the path.  You are  not allowed to use any circle more than once.

Here is how I translate the rules:

The original file included 38 problems for students to solve spread over 7 pages (8 pages including instructions.)  I have condensed the puzzles to fit on 5 pages.  The last two puzzles are rather large and had to be placed on the 5th page.  If you are content with having only 36 problems, you could just print the first four pages front and back and use only two pages.

I used these as a quick warm-up with my trig class yesterday, and my students really seemed to enjoy them.  My student aide in my trig class asked if I could print all of the puzzles for him.  I think that means this puzzle is a winner!  If I taught geometry, I would definitely find a way to incorporate these into my class.  I think I will start using them as warm-ups in my Algebra 1 classes.

Page 1:

Page 2: 

Page 3: 

Page 4: 

Page 5: 

File is uploaded here.  You can find Inaba's original Japanese version here.  Solutions are posted here

I'm looking forward to translating and making printer friendly versions of more puzzles soon.  Have a specific puzzle you want me to do next?  Leave me a comment :) 


  1. Wow, thanks! I saw them on your Twitter last night and was intrigued. Am I assuming correctly that the x on the lines (starting in #7) means that you can't go that way?

  2. Sarah, do you have any of his books? Or are all of these puzzles downloaded from his website? - Wendy Menard

    1. I don't have any of his books. I have downloaded all of his puzzles off of his website. You might have to use Google Translate to help you navigate!

  3. I use these as entry tasks for my Geometry classes- one page per day. The kids love them. I also hide the author's name and the name of the puzzle because my resourceful and competitive students tend to google the answer keys... I will give credit to the author on the last day of our puzzling.

    1. I love this idea! Going to be teaching Geometry for the first time in a few years starting next week - thank you for starting me off!

    2. Great idea! I'd like to find a way to use logic puzzles as a warm-up in my Algebra classes for next year!