A circle of radius 1 rolls around a triangle of area A and perimeter P, pivoting around the corners. What shape path does the center of the circle trace? What is the area and the perimeter of the shape it traces?
#Geometry Ts: You & your Ss don’t need advanced tech expertise to start exploring, playing, & modeling in #3D. 🙂 @geogebra 3D calculator = great setting to do this! To see how this was made (in < 2 min): https://t.co/mnO35EFgPU. #MTBoS#ITeachMath#math#maths#EdTech#MathEd
New video: Simulating an epidemic.
What happens when people avoid each other for the most part but still go to a common central location like a store?
What if you can track and isolate cases, but 20% slip through the cracks? 50%?
And much more.
https://t.co/z3ULZWQxPW
@JudyAnderson6 I’m shocked by this news, Judy! You’ve had such an incredible impact on Mathematics Education and shaped many teachers who have done remarkable things. Had so many insightful chats with you in your office. Can’t imagine USYD without you!
2 photos, 12 months apart.
2018: One girl, Stockholm
2019: ~4-10 million people, 100s of global cities, every continent. Possibly the largest global protest ever.
Power of one.
From here? Either things change or it will grow.
Unite behind the science. #ClimateStrike 🌱🌏
@classpadnet is something worth checking out: Now in Beta, free version to be released on Jun 22 and all features will be free till August, after which some features will require subscription #edtech#math