Triangles at work in this 44 metre high Kinsol trestle.

Learning about angles using a dynamic fan model. Use the fan to compare the angles formed by dancers’ arms and to orient yourself on land. sfu.ca/geometry4yl.html

Another activity to develop spatial, holistic reasoning in mathematics. Thinking of the changing phases of the moon and how they relate to circles. Two Circles: sfu.ca/geometry4yl.html🙏 @dpscher and Quincy Wang. #bcedchat #bcamt #geometry

Exploring and constructing polgons while meeting new geometric vocabulary and making shapes you have never seen before! A Plethora of Polygons: sfu.ca/geometry4yl. #bcamt #bcedchat

We are working on new activities for elem school kids... interesting, engaging & deep mathematics... The first one is up: sfu.ca/geometry4yl.html. Thanks Sandy Bakos, @annetterouleau, Victoria Guyevskey, Rebecca Cohen. Check out Symmetry & Triangles activities. #bcedchat #bcamt.

Exploring tessellations with websketchpad: some are familiar and some are chellenging our definition about no overlap and no gap.

Or, in the colour calculator, 28513/99999 with table width 6 for the left and table width 5 for the right. Try! sineofthetimes.org/experimen…

Desirée Patterson uses geometric transformations of photographs—anamorphic like—to explore human impact on nature. See her Anthropocene art at the King Edward station!

Bringing geometry and spaghetti together! thisiscolossal.com/2019/06/a…

Making symmetry with some two handed rope work at the Fröbel museum in Bad Blankenburg

For when you need to make a straight line on the board: unroll the string from the device, which coats it with chalk, pin to board and give the string a quick tug. Ta da! Who needs rulers anyway?

For when you need a break from Platonic solids... diversity of faces so attractive...

2000 BCE Assyrian circles and triangles. Our constant companions for more than four thousand years. .

A compass for those who >really< like circles.

Moiré dynamic geometry by Takahiro Kurashima. This “poemotion” turns circles into@polygons.

Froebel’s first gift: balls of yarn. Sensory experiences of lines, loops, crossings, insides, boundaries... all lures into geometry

Some tired circles... at least they won’t roll away! By French artist Bernar Venet...