Peter Gallin (@GallinPeter) profile picture

Peter Gallin

@GallinPeter

Mathematiker, Didaktiker. Ziel: Vermeiden von Mathematikschädigung.

 CH-8494 Bauma
gallin.ch
Joined May 2019
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Photo by Peter Gallin (@GallinPeter)Photo by Peter Gallin (@GallinPeter)Photo by Peter Gallin (@GallinPeter)Photo by Peter Gallin (@GallinPeter)Photo by Peter Gallin (@GallinPeter)Photo by Peter Gallin (@GallinPeter)Photo by Peter Gallin (@GallinPeter)Photo by Peter Gallin (@GallinPeter)Photo by Peter Gallin (@GallinPeter)Photo by Peter Gallin (@GallinPeter)
Catch the infinity! Normally the exterior of the symmetric white Swiss cross with the dimensions 6 and 7 (see figure) is red. Here the whole infinite exterior red area is reflected on the circle (see figure). What is the area of the red part of the figure.
Image from Peter Gallin (@GallinPeter)
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Geometry puzzle. #pentagon #mathiratti
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Peter Gallin retweeted
Ceyhun Köylüce (@MathCeyhun) profile picture
Ceyhun Köylüce@MathCeyhunOct 10
Blue Area = ?
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Geometry puzzle. #pentagon #mathiratti
Image from Diego Rattaggi 🇨🇭 (@diegorattaggi)
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Image from Igor Tigerrr Geometerrr (@TigerGeometerrr)
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Geometry puzzle. #pentagon #mathiratti
Image from Diego Rattaggi 🇨🇭 (@diegorattaggi)
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Carlos Cabral (@cesscabral) profile picture
Carlos Cabral@cesscabralSep 27
Arbitrary triangle, any point 1 on each side. 3 circles passing through the vertex and the points on the adjacent sides. They always intersect at a central point!
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Image from Igor Tigerrr Geometerrr (@TigerGeometerrr)
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Peter Gallin retweeted
SKG (@sonukg4india) profile picture
SKG@sonukg4indiaSep 10
The figure of mathematics
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SKG (@sonukg4india) profile picture
SKG@sonukg4indiaSep 9
👑💎
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SKG (@sonukg4india) profile picture
SKG@sonukg4indiaSep 3
A regular pentagon. Please show a/b and c/a in terms of golden ratio. H Lee's
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Viterick Llanos (@viterick) profile picture
Viterick Llanos@viterickSep 2
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cizikci (@eylemboss0306) profile picture
cizikci@eylemboss0306Aug 31
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Peter Gallin retweeted
SKG (@sonukg4india) profile picture
SKG@sonukg4indiaAug 31
MG's 🧩
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Geometry puzzle. #pentagon #mathiratti
Image from Diego Rattaggi 🇨🇭 (@diegorattaggi)
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Peter Gallin retweeted
SKG (@sonukg4india) profile picture
SKG@sonukg4indiaAug 25
An interesting question popped up in my search of decagon. Complex number was used in the solution. I have come up with a simple solution without trigonometry. Would you like to give it a try?
Image from SKG (@sonukg4india)
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Geometry puzzle. #heptagon #mathiratti
Image from Diego Rattaggi 🇨🇭 (@diegorattaggi)
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Peter Gallin retweeted
SKG (@sonukg4india) profile picture
SKG@sonukg4indiaAug 22
Any other alternatives 😂😂
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Replying to @MatildaSpicer
@MatildaSpicer
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Peter Gallin retweeted
SKG (@sonukg4india) profile picture
SKG@sonukg4indiaAug 15
#morning with #math An ellipse is inscribed inside a semiellipse with info shown. Find the maximum ratio of an Ellipse area to Semiellipse area and its parameters ?
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