In This Issue
Math Forum Online PD Courses
Math Girls Talk About Trigonometry
Foldable Calendar Polyhedral Models
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PoW taking place: math problemsolving moment of the week

"First I see that it's like a connectthedots. It has an
order but the answer is not always right next to the previous
number. I started by drawing a table.... I found them all out,
but it doesn't answer the question. To find the answer ..."

 Eli, highlighted in the FunPoW's Latest Solution

http://mathforum.org/pows/solution.htm?publication=4512
Math Girls Talk About Trigonometry
https://www.createspace.com/5164921
Bento Books has published the third volume in its Math Girls
spinoff series, Math Girls Talk About...
Math Girls Talk About Trigonometry explores a variety of fun
and informative topics in trigonometry. Check out the first
chapter, full table of contents, and index in this
sample download:
http://bentobooks.com/resources/MGTA3 TrigonometrySample.pdf
This new book ranges from basics like defining the sine
function to less frequently seen topics like Lissajous curves.
It consists of five chapters, each with review problems
and answers:

Round Triangles

Back and Forth

Around and Around

Calculating Pi

Addition Formulas
As with the first two volumes from this series, the math topics
in Math Girls Talk About Trigonometry arise out of
conversations among the characters from the young adult novel
Mathematical Girls — also by author Hiroshi Yuki — the
Japanese language version of which has already gone through
some twenty printings.
For more of Bento Books' publications, first featured in these
pages three years ago, check out
http://bentobooks.com/publications/

Now taking place: math education conversation of the day

"Given a 3frequency geodesic sphere (icosabased,
ominitriangulated), how many triangular facets does it have,
and how many edges and vertexes? We just need to plug in the 3
to get V (number of vertexes), subtract 2 to get N, then the
ratio N:F:E is 1:2:3, so we're done. But how many sixth graders
even know that? Too much algebra?"

 Kirby, posted to the mathteach discussion

http://mathforum.org/kb/thread.jspa?threadID=2668072
Foldable Calendar Polyhedral Models
http://www.cleavebooks.co.uk/trol/trolqc.htm
Want a 2015 calendar to ring in the new year mathematically? Or
a timely manipulative to engage your geometry students? Or a
lastminute handmade gift for the geekwhohaseverything?
Download a polyhedron net and fold up your own
threedimensional, 365day calendar!
British publishers Cleave Books offer these 3D models
formatted to print out on standard 8.5" × 11" paper:

cones

rhombic prisms

triangular prisms

pentagonal antiprisms

tetrahedra

right pyramids

oblique pyramids

octahedra

rhombohedra

deltadodecahedra

triangular prisms

hexagonal prisms

tetrahedra

flexitetrahedra


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