The Reuleaux Car The pieces are below, and an AI, SVG, and Corel File are available here. The file has a laser etch on the big wheel to guide the placement of the smaller piece. Glue two small pieces to one side and two large ones on the other side. The wheel holders work by sliding so you can install

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## Take and Make: Area Trick Puzzle

This one is easy fun and somehow a little bit magical. Makes a great little math gift. The challenge is to make rectangles with pieces #1-5, #1-6, #1-7, and #1-8 (as below) Details, Instructions and Template Here. Here are the “versions” in a short video. These pieces are made in relation to eachother so there are many versions

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## Crafting Conic Sections with MTCA – Dec. 2 Math Teacher’s Circle of Austin

Teachers enjoy models and making and they take that enthusiasm and activity back to their students. Hosted by Professor Jennifer Austin of University of Texas at Austin, this was a particularly fun meeting. We discussed how we make these models – see MAA Horizon Do the Math Article , tried using paper templates and slicing into playdoh. See Take and

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## Take and Make: Conic Sections Model

Turns out you can use CorelDraw to reverse engineer the parts to a conic section model. Read all about it in the November 2021 MAA Math Horizons page called Do The Math (p. 29). Editor Tom Edgar was fun to work with, and made the graphic images. Note: if you are “making” this model from scratch, once you find the

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## Finally Making a working Peaucellier Linkage

Why does this project NEVER turn out? It happens that we have been missing a critical fact. The arm of the linkage is NOT the same length as the radius (k) of the larger reference circle used for the inversion even though we wanted it to be. The workshop is littered with failed tries. The arm length and the sides

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## Take and Make: Platonic Solids Coasters!

Plain Platonic Solids are pretty cool – fun shapes, interesting properties from side type: triangle square and pentagons; number of edges; number of faces and more. But they are also plain. Fall intern and UTeach Maker, Maddie Wallace took on the challenge to make some accessories that would create a way we can sort them, and match the objects to

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## Take and Make: Homeschool Day at the Austin Zoo 2021

Happy Homeschool Day at the Austin Zoo! It’s going to be 80 degrees and sunny, a great day for learning outdoors. We will be there featuring our geometry kits. But we are bringing other great projects too with examples with instructions. The event is preregister only, but you can make these great math projects anytime. Template Folder Here. Beside to

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## Take and Make: Napier’s Bones Calculator

Napier’s Bones are a manually operated calculator created by John Napier in 1612. This calculator is based on Lattice Multiplication and helps math learners with multiplying large numbers by a single digit number. Math learners! Start identifying multiplication patterns by making your own set of Napier’s Bones! Materials: Napier’s Bones Paper Template: https://tinyurl.com/rh5xdajt Writing utensil (pencil or pen) Popsicle sticks

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## MathHappens at Museum Day September 19, 2021

We are so excited to be back in person this year for Austin Museum Day! This year we will be hosting activities at two locations: Austin Nature and Science Center and Neill-Cochran House.

## Geometric Shapes and Tools with Campers at STEM Santa FE

We took a “Maker” approach at STEM SantaFe’s camp this week. Students experimented with different ways to make a moveable joint using a variety of materials: balloon pieces, tin foil, brads, rubber band and even the wax paper bag the materials came in. Creative ideas included bending the brads to make tension, combining brads with balloons. We also made 3

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