Timeline for Are precise drawings important in geometry?
Current License: CC BY-SA 3.0
17 events
| when toggle format | what | by | license | comment | |
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| Apr 17, 2016 at 5:15 | comment | added | Tommi | @JoeTaxpayer Feel free to ask the other questions if they interest you. | |
| Apr 12, 2016 at 13:18 | comment | added | JTP - Apologise to Monica | The more I ponder this, it seems to become 3 questions - What the teacher draws (as you intended), the expectation for students, i.e. how off can their drawing be, yet still be marked correct, and last, is there any value in "this image is not to scale, intersecting lines are not perpendicular unless stated, lines are not congruent unless stated, etc." | |
| Apr 10, 2016 at 4:52 | comment | added | Tommi | I edited the question a bit to emphasize that the question is about what the teacher draws. | |
| Apr 10, 2016 at 4:51 | history | edited | Tommi | CC BY-SA 3.0 |
further emphasis
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| Apr 10, 2016 at 4:26 | history | edited | Tommi | CC BY-SA 3.0 |
minor edit that hopefully clarifies the question
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| Apr 9, 2016 at 21:19 | answer | added | Amir Asghari | timeline score: 3 | |
| Apr 9, 2016 at 16:33 | answer | added | Benoît Kloeckner | timeline score: 3 | |
| Apr 9, 2016 at 7:46 | answer | added | Tommi | timeline score: 3 | |
| Feb 17, 2016 at 15:36 | comment | added | philsf | My geometry teacher in high school was very skilled in drawing exact and beautiful figures. Nevertheless, perhaps mockingly, he always said that 'Geometry is the art where the student sees what the teacher can't draw'. | |
| Feb 11, 2016 at 8:45 | answer | added | marco trevi | timeline score: 3 | |
| Feb 10, 2016 at 13:01 | answer | added | JTP - Apologise to Monica | timeline score: 5 | |
| Feb 10, 2016 at 8:28 | answer | added | Jessica B | timeline score: 9 | |
| Feb 9, 2016 at 19:54 | comment | added | Karl | Sorry I assumed you were referring to students for which I believe it vital. You should make your drawings reasonable. If a triangle is 4 cm high then draw it to an enlarged grid 4 cm high. | |
| Feb 9, 2016 at 19:49 | comment | added | Tommi | @Karl Note that the question asks if I, as a teacher, should draw the figures exactly (even when teaching something else besides exact drawing of figures). | |
| Feb 9, 2016 at 19:26 | comment | added | Karl | Absolutely yes you should get them to draw it exactly if you are calculating area for the first time. I will add a fuller answer in time. Sketches have a role in maths but even these have to be 'reasonable'. I will include specific examples when I have chance. | |
| Feb 9, 2016 at 14:17 | comment | added | user1815 | My unsupported opinion is that you should demonstrate it in the way you want the students to do it. There is some value in a person knowing when to be precise and when to make a speedy, rough approximation. In early college years, among the students I teach, I find some are always rigid, some always lax, and some can distinguish when precision is more appropriate than approximation. I think by 18-19 years old, a person should learn when precision is appropriate, but I'm not sure how best to develop that. I do think, though, that the teacher's behavior is a model for the students. | |
| Feb 9, 2016 at 6:37 | history | asked | Tommi | CC BY-SA 3.0 |