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Triangles
Jun 23, 2019 22:01:18 GMT
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Post by Fortmax2020 on Jun 23, 2019 22:01:18 GMT
A question has arisen on Asteroid M this evening.
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Triangles
Jun 23, 2019 23:10:29 GMT
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Post by Pinwig on Jun 23, 2019 23:10:29 GMT
It's hard enough to teach kids what triangles are in the first place. If you go rounding the edges and calling them safety triangles you can come and try and explain that to my class.
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Triangles
Jun 24, 2019 5:32:22 GMT
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Post by Fortmax2020 on Jun 24, 2019 5:32:22 GMT
I am disturbed by a teacher who puts geometry first before the safety of his pupils. What a sad world we live in.
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Triangles
Jun 24, 2019 7:16:20 GMT
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Post by The Doctor on Jun 24, 2019 7:16:20 GMT
If the corners are curved they are no longer triangles!!!
-Ralph
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Triangles
Jun 24, 2019 17:21:13 GMT
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Post by Fortmax2020 on Jun 24, 2019 17:21:13 GMT
Don't be swayed by this madman!
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Post by Pinwig on Jun 24, 2019 17:43:14 GMT
Ah, I see. The argument went that way round did it. Wasn't expecting that.
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Triangles
Jun 24, 2019 18:00:15 GMT
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Post by Fortmax2020 on Jun 24, 2019 18:00:15 GMT
He just won't think of the children.
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Post by Pinwig on Jun 24, 2019 18:01:54 GMT
You're a scientist, man! The only triangles with curves are the ones made by Dairylea!
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Post by blueshift on Jun 24, 2019 18:02:58 GMT
Awful as it is, Ralph is right. A triangle with round corners isn't a triangle.
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Triangles
Jun 24, 2019 18:13:10 GMT
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Post by Fortmax2020 on Jun 24, 2019 18:13:10 GMT
You think in such two dimensional terms. How small you've become.
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Post by Philip Ayres on Jun 24, 2019 18:34:25 GMT
If the corners are curved they are no longer triangles!!! -Ralph The definition of a Triangle requires the edges to be points and the internal angles of those points to add up to 180°
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Triangles
Jun 24, 2019 20:14:55 GMT
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Post by Fortmax2020 on Jun 24, 2019 20:14:55 GMT
Only in Euclidean space.
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Triangles
Jun 24, 2019 20:36:13 GMT
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Post by Shockprowl on Jun 24, 2019 20:36:13 GMT
Are we... Are talking about soft cheese triangles here? 'Cos I can never unwrap them without squishing them a little bit.
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Post by Grand Moff Muffin on Jun 25, 2019 19:53:46 GMT
The definition of a Triangle requires the edges to be points and the internal angles of those points to add up to 180° Only on a flat surface / space in the absence of gravitational forces - i.e. space which only exists conceptually, like a true vacuum. If a straight line is the shortest course between two points, then a triangle formed by three straight lines on the surface of a sphere (or the Earth) has angles adding up to more than 180°. The triangle formed by the North Pole and two points on the equator, 6 time zones apart, has a right angle in each corner and they add up to 270°. Martin
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Triangles
Jun 25, 2019 20:03:56 GMT
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Post by Pinwig on Jun 25, 2019 20:03:56 GMT
But the earth is flat!
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Post by Benn on Jun 25, 2019 20:14:51 GMT
This thread is going places...
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Triangles
Jun 25, 2019 20:19:50 GMT
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Post by Pinwig on Jun 25, 2019 20:19:50 GMT
As long as it's in a straight line.
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Triangles
Jun 25, 2019 20:46:33 GMT
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Post by Fortmax2020 on Jun 25, 2019 20:46:33 GMT
I knew Martin would talk child friendly sense! He has a good and kind mathematically acute heart.
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Triangles
Jul 5, 2019 21:27:40 GMT
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Post by The Doctor on Jul 5, 2019 21:27:40 GMT
What next? A circle that isn't round??!!
-Ralph
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Triangles
Jul 5, 2019 22:02:49 GMT
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Post by Fortmax2020 on Jul 5, 2019 22:02:49 GMT
A circle is a line when viewed side on.
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Triangles
Jul 5, 2019 22:04:48 GMT
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Post by The Doctor on Jul 5, 2019 22:04:48 GMT
Impossible. I'd have to mush my face into the paper to see that.
-Ralph
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Triangles
Jul 5, 2019 22:05:40 GMT
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Post by Fortmax2020 on Jul 5, 2019 22:05:40 GMT
Only if the circle was drawn... on paper.
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Triangles
Jul 5, 2019 22:07:15 GMT
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Post by The Doctor on Jul 5, 2019 22:07:15 GMT
But they are!
-Ralph
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Triangles
Jul 5, 2019 22:32:43 GMT
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Post by Fortmax2020 on Jul 5, 2019 22:32:43 GMT
Oh dear.
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Post by The Doctor on Jun 25, 2020 9:26:16 GMT
Circles are on paper!
-Ralph
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Post by Grand Moff Muffin on Jun 25, 2020 11:30:08 GMT
But you don't have to look down on the paper directly from above the circle. You can look at it from an angle, or bend the paper, and then the curcle appears oval. And if you look at the paper edge on, it looks like a line - a bendy line if the paper flops.
Martin
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Triangles
Jun 25, 2020 12:00:47 GMT
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Post by The Doctor on Jun 25, 2020 12:00:47 GMT
Moons of madness!!!
-Ralph
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Post by Grand Moff Muffin on Jun 25, 2020 12:57:16 GMT
Moons are (more or less) spherical, so (provided they are properly lit) they look round from every angle. Martin
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Triangles
Jun 25, 2020 17:33:16 GMT
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Post by Fortmax2020 on Jun 25, 2020 17:33:16 GMT
Moons of Madness! Not all moons are spherical.
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Post by Grand Moff Muffin on Jun 25, 2020 18:02:59 GMT
Grown-up ones are.
Martin
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