32 Why are triangles so prevalent in high school geometry? 2015-01-04T16:11:13.670

32 Real-world examples of more "obscure" geometric figures 2015-03-04T17:39:35.863

29 Is this homework problem on counting triangles within a 4x4 grid too vague? 2016-11-28T20:36:57.107

28 What is a good method for drawing a MÃ¶bius band on the blackboard? 2015-11-09T19:24:42.340

27 Is Euclid dead? or Should Euclidean geometry be taught to high school students? 2014-04-30T11:27:34.983

25 Given a 3 4 5 triangle, how do you know that it is a right triangle? 2015-10-27T19:20:55.793

24 Why do we care about multiple proofs of the same theorem? 2016-11-27T20:16:28.250

23 Why should kids learn how to use a compass and straightedge, and not rely on a drawing program? 2017-06-13T18:34:31.393

21 Pi or Tau? How should the circle constant be taught? 2014-03-19T18:05:17.470

19 Are there disadvantages to teaching complex numbers as purely geometrical objects? 2014-04-22T12:57:25.120

18 Teaching manifolds to high schoolers 2014-12-05T06:48:07.330

18 At what point is it a disservice to pass someone on to the next math class? 2015-11-01T19:53:49.313

17 A parabolic arc is not semicircular. But students think so 2015-02-09T03:35:47.657

17 Should we teach abstract affine spaces? 2015-04-02T15:56:08.753

16 How to explain that we live in a three-dimensional world? 2014-12-03T15:53:54.770

16 Impossibility of trisecting the angle, doubling the cube and alike, what are reasons for or against discussing them in a course on algebra? 2015-10-18T16:03:04.557

16 Evidence for or against the claim that some students are "algebra people" and others are "geometry people" 2016-03-23T02:33:24.900

15 A text-based program to draw geometric figures 2015-07-05T16:27:38.967

15 Are precise drawings important in geometry? 2016-02-09T06:37:01.800

14 How to teach affine geometry to future high-school teachers? 2015-04-21T15:14:57.643

13 Visual Pythagorean demonstration 2014-03-13T23:18:50.390

13 Wiggins' question #12 2014-05-31T23:36:38.097

13 Simpler explanation for finding the vertex of a parabola 2015-10-02T15:45:30.027

13 Should my 8th graders see a proof of the Pythagorean Theorem? 2016-03-16T13:23:20.027

12 Is there an elementary way to explain that a map of the earth cannot preserve distances? 2015-01-13T15:20:23.517

12 Geometry with a view towards differential geometry textbook 2015-03-20T20:59:10.690

12 What is currently called geometry in high school? 2017-02-18T17:16:56.823

12 Can we explain to undergraduates how points make a line? 2017-09-05T22:39:20.070

11 What prerequisites would college students need for a course based primarily on Euclid's elements? 2014-03-13T23:54:58.280

11 Reasons to teach Thales' theorem 2014-04-23T19:31:07.670

11 Symmetry - practical usages 2014-05-03T00:38:09.950

11 Helping students use constructions in geometry 2014-11-22T21:16:04.163

11 Rigorously defining the concept of an angle for high school students 2016-01-03T14:20:36.683

10 Appropriate education level for this geometry problem 2014-04-08T07:39:02.987

10 Project/Assessment based on Flatland for Secondary Geometry Class 2014-12-28T19:49:53.447

10 Good lessons/activities for one-day subs 2015-05-15T14:02:37.090

10 Lesson-planning: Teaching probability concepts via geometry 2015-08-19T18:23:05.447

10 Phrasing the Van Hiele levels in student-friendly language 2016-01-07T22:35:32.650

10 Physical vs. Virtual manipulatives in the high school classroom 2016-03-07T23:56:21.103

10 How to denote angle? 2016-12-11T12:10:47.163

9 Extensions beyond Euclidian Geometry for Secondary students 2015-03-18T16:40:55.283

9 Examples of Mathematical Beauty in School Mathematics 2015-04-11T01:07:23.287

8 Adoption / penetration rates for dynamic geometry software in secondary school 2014-04-28T14:19:24.153

8 Secondary Geometry Curriculum Sequencing? 2014-11-05T18:48:34.013

8 Moore method projective geometry 2015-03-25T04:36:32.933

8 Teaching geometric transformations through fractals? 2015-03-26T02:27:04.200

8 Gifs of finding the volume of 3d shapes? 2015-03-30T15:07:38.997

8 Coverage of Fundamentals of Lines and Planes 2015-11-30T00:17:05.040

8 The role of "area" in a Common-Core aligned high school classroom 2016-08-15T17:17:55.570

8 What is the term for the marks used to show congruence in geometric figures? 2017-05-31T15:03:38.690

8 Learning Math like Euclid 2017-08-30T13:46:13.300

8 How do you explain straightness to a 5-year-old? 2017-10-03T23:10:44.053

7 Will presenting non-Euclidean geometries to students before Euclidean geometry give them a better intuition about shapes on the plane? 2014-07-13T16:46:44.760

7 How Can I Motivate Geometric Constructions? 2014-12-13T23:01:18.307

7 Experience using Khan Academy badges for basic math courses 2016-01-01T14:13:57.587

7 Using number theory instead geometry to introduce proof in Basic School? 2017-10-08T14:34:16.073

7 Resource to supplement to Euclid's Elements 2017-12-13T17:36:34.817

6 Notation of points with coordinates 2014-12-10T10:28:10.910

6 Integrate Coding into the Geometry Curriculum 2015-12-04T23:07:26.407

6 How to reasonably denote lines, line segments and rays? 2016-08-15T12:38:53.417

5 Intuitive explantion: What is a Finsler metric? 2014-09-11T00:42:42.390

5 Approaches to Teaching for Questions Around Partitioning Space 2015-09-08T04:48:01.277

5 the role of context in mathematical discussions of units and measurement in web design 2015-11-20T17:36:04.807

5 Looking for a classic paper "Vinner and Hershkowitz" 2015-12-09T16:44:49.680

5 Should the construction of triangles be taught? 2016-07-28T07:17:23.347

5 At what educational stage are angles greater than 180 introduced? 2016-12-14T23:59:03.347

5 Wording VS mathematical notations 2017-05-14T08:19:26.477

5 How to teach mass center for young people 2017-05-20T21:50:31.977

5 Applications of notable points and lines of a triangle 2017-11-08T02:21:49.483

4 Explaining the algebra behind a problem in computer geography 2014-06-05T21:38:22.970

4 Explanation challenge: Why is a spiral ray-gun difficult to aim? 2014-10-09T00:04:01.817

4 Fun Activities/Games Before a Break/Between Units for Secondary Geometry 2014-11-19T16:50:50.900

4 Suitable Curriculum for Algebra through Pre-Calc students in One Class 2015-08-05T15:59:06.313

4 What are the best expository pieces related to the Van Hiele models? 2015-12-12T19:01:59.773

4 Notation of line segment and its length 2016-07-12T08:42:48.767

4 A formula for the area of a rectangle 2017-05-18T15:35:04.490

4 How to explain how to get an end point of a segment from the other end point and it's midpoint? 2017-09-18T05:53:23.917

4 Resources for precalculus applications 2018-02-26T21:00:09.587

3 Sketching paraboloids on paper 2016-03-19T12:32:14.837

3 Geometric Algebra Resources 2016-03-21T14:13:12.923

3 Resources on 3D transforms, vectors, coordinate systems 2016-05-08T23:20:39.853

3 Which math class should I take as an exchange student in the USA (OH)? 2016-06-17T08:56:27.127

3 Consolidating three descriptions of a parabola in precalculus 2016-12-20T17:47:41.730

3 "A" or "The" Cartesian plane? 2017-01-20T15:02:29.177

3 calculus without analytic geometry 2017-03-19T20:07:43.107

3 Is the Nomenclature of Triangle Congruency Proofs Consistent? 2017-11-30T15:53:54.887

3 Books and worksheets on symmetry 2018-02-11T20:04:25.793

2 interesting/challenging geometric constructions for gifted secondary students 2015-02-17T02:43:15.680

2 Which book should I refer to for analytical solid geometry? 2015-10-30T19:16:46.870

2 How are geometric proofs related to geometric pictures? 2016-03-03T20:07:22.423

2 GRE Geometry Reference Request? 2016-11-23T01:31:19.633

2 Learning High School Geometry in Ten Days 2018-01-01T20:08:56.293

2 In what curricula are "rectangles" defined so as to exclude squares? 2018-03-02T13:44:59.933

1 Preparation to exams 2015-05-29T20:21:05.580

1 Why is the volume of a square pyramid a third of that of a square prism? 2015-12-26T00:04:38.573

1 Interesting math lesson on integers, Euclid's Elements, polyhedra, prime numbers, non-Euclidean geometry, arithmetic functions or graphs 2017-08-30T10:28:43.823

-1 Turning triangle on Y and X axis 2018-03-06T22:45:31.360

-2 symmetry of a square - is it possible pure geometric approach in didactics? 2016-06-01T05:14:24.420