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0 answers
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Schlafli symbols for antiprisms and crossed antiprisms

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4 answers
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What is currently called geometry in high school?

15 votes
7 answers
832 views

Can we explain to undergraduates how points make a line?

6 votes
7 answers
510 views

Can we define length and perpendicularity not via an inner product?

11 votes
5 answers
2k views

How to justify formula for area of triangle (or parallelogram)

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1 answer
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What is the term for the marks used to show congruence in geometric figures?

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1 answer
103 views

Math textbook for secondary school using Logo like syntax

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62 views

Math textbook for secondary school using Logo like language

7 votes
6 answers
6k views

Is there online geometric construction software that models physical constructions?

8 votes
5 answers
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Models for spherical geometry

2 votes
2 answers
174 views

Comparison of two ways to introduce translation to 12-14 year olds

4 votes
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When can students understand the intersection of two circles?

2 votes
1 answer
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About a difficult exercise for 12 years pupils

4 votes
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191 views

Infinite descent method in geometry

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