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1 Parallelogram + 1 Midpoint + 1 Line Through this Midpoint & Vertex + 1 Perpendicular Segment = 😮? How can we formally prove this phenomenon true? 🤔 Animation: https://t.co/8izmySs0tD (Source: ).

13 30
2019-02-10

In this incircle + extension animation, what is the measure of the green angle? Why is this ALWAYS the case? 🤔(Source: ) https://t.co/A6rEjBr5pT

3 5
2019-02-06

Carnot's - Case of an OBTUSE Dynamic Illustration without Words. How can we formally prove this phenomenon? 🤔(Source: ). https://t.co/qUDdwQwNTh

8 15
2019-01-31

Absolutely LOVE the challenges creates! This 1 = definitely 1 of my top favs. In this regular octagon, how can we formally prove the area of 1 green square = area of the pink rectangle? 🤔https://t.co/XLcUVvpbyu

15 40
2019-01-28

Arc Length in Polar Coordinates (#Calculus): Dynamic & Modifiable Explorer & Illustrator. Created w/: https://t.co/OYvvLamA1y.

19 47
2019-01-23

It seems like definitely knows how to distract me on any given AM: https://t.co/voJpKjKw4T. 🙂 And so far, there's 7 of his items in this collection: https://t.co/L2EPffsGkA.

12 33
2019-01-22

In this animation, why are the 2 pink angles always congruent? (Source: ). Explore here: https://t.co/tpusqTwVCB.

4 9
2019-01-21

Circles shown are internally tangent. How can we prove the 2 blue angles are always congruent? 🤔(Source: ). Explore here: https://t.co/u2Ifu0Hrt2.

3 12
2019-01-16

2 Concentric Semicircles + 2 Chords + 2 Perpendiculars = 😮? How can we formally prove these phenomena true? 🤔 Source: . Explore here: https://t.co/emj98BUbY4.

6 16
2018-12-28

SAVE THE DATE! SAT MARCH 30, 2019 = Day at (National Museum of NYC)! 😃 More info: https://t.co/9gg5satmJp. Hope to see YOU there along w/ , , D. Lieban, Z. Lavicza, Ho Gul Park, & others!

2 14
2018-12-27

Going to If so, come explore HOW EASY IT IS to use 's apps (GC, & yes, 😃) to foster engaging & exciting, active, student-centered, discovery learning! We'll explore EXAM MODE too. TH 12/6 - S#40 Salon 4/5.

7 15
2018-11-26

Couldn’t play with background shadows here, but the 3D effect is nice.

16 67
2018-02-25

students became da Vinci today and redesigned basic catapults to intro quadratics and projectile motion.

0 1
2017-05-13