# 3d iteachmath math maths geometry proof mathed edtech hsmath collegemath circle figurethat mathedtech desmos funwithdesmos augmentedreality ipad arkit 3dmodel desmosart calculus apcalc calculator lifeis3d whymodelonlyin2d 3dmodeling

What causes a conic section to be a parabola? 🤔 Quick cause & effect demo in Why not give Ss opportunities to tell us what they see vs. us immediately telling them what to see? https://t.co/00lmQ6Y8Xc. For all conics: https://t.co/y0lB6Vf0FS.

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2020-02-27

Pythagorean theorem- Dissections

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2020-02-19

An unusual (not often seen) sufficient condition that guarantees a quadrilateral to be a parallelogram. How to prove? 🤔 Source: . https://t.co/WG1ElKNV2v

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2020-02-15

Sum of interior angles of a polygon

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2020-02-11

Drawing an ellipse with three circles

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2020-02-10

Opposite Angles of a Cyclic Quadrilateral add up to 180 Degrees

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2019-12-31

Added a few more characters (PigPen, Woodstock, & Sally) to this year's holiday Peanuts dance. 🙂 https://t.co/bf8fDV4TV7

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2019-12-26

30-60-90 triangles properties

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2019-12-22

cosine waves with square cross sections transformed into cosine waves with rhombus cross sections having interior angles measuring 60 deg & 120 deg. Created in on

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2019-11-29

Drawing a diameter with two circles

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2019-11-29

Here, the scene we New Englanders desperately miss this time of year. Now to go back and actually rock the boat... 🤔https://t.co/9j9N4LyDTw

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2019-11-26

Equilateral triangle to square dissection

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2019-11-26

Opposite angles of a cyclic quadrilateral add up to 180 degrees

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2019-11-17

Custom Solid: Each cross section || yAxis = a parabola with latus rectum = upper(x) - lower(x). Upper & lower FNS, limits of integration all modifiable: https://t.co/RzVZjq4RWa. Shown here in w/#AugmentedReality.

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2019-11-15

2 Cylinders + Hemisphere + Torus = Lamp ? More composite solid modeling in with More info re: getting started: https://t.co/tVhsrQbb4t

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2019-11-12