Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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Happy Easter to all.

**MathsIsFun**- Replies: 5

Made an Android App:

Would really value hearing your experience with it so I can improve it.

Thanks guys.

Probably best I just don't mention time. Save it for another time

**MathsIsFun**- Replies: 5

I am working on a short video about Dimensions.

This is my script. Is it accurate? Does it convey the ideas well?

script wrote:

Hi! Let's learn about Dimensions

In Geometry we can have different dimensions.

Let us start with a point.

Can't see it? Well it has no size, so we will highlight it.

Now lets allow the point to move in one direction.

We get a line.

We need just one value to find a point on that line. So we have one dimension.

A line is one-dimensional.

Now lets allow the point to move in another direction. And we get a plane.

We need two values to find a point on that plane. So we have two dimensions. We call it 2D.

A 2D object is flat.

Circles, triangles, squares and more are two-dimensional.

We also call them plane shapes.

Now we let that point move in another completely different direction and we have three dimensions.

Spheres, cubes, cylinders and more are 3-dimensional.

We also call them solid shapes.

We can have more dimensions, but I can't draw them.

In Physics Time can be thought of as a dimension, but not in Geometry.

Welcome to the forum, Timothy!

Chris2 wrote:

Nice to know how you look like (well, not in a creepy way).

I wish I looked and sounded that good! That is Joe, he does voices.

Happy Christmas all!

**MathsIsFun**- Replies: 8

Made a video for Cardinal, Ordinal and Nominal Numbers

Comments and suggestions please!

**MathsIsFun**- Replies: 2

November 23rd => 1,1,2,3

(But the sequence actually starts at 0)

Leonardo Pisano Bogollo, as well as being famous for the Fibonacci Sequence, helped spread Hindu-Arabic Numerals through Europe in place of Roman Numerals.

Excellent review, thank you!

**MathsIsFun**- Replies: 3

A fun and useful page: Estimate Distance

What do you all think?

**MathsIsFun**- Replies: 3

A page to help clear up any confusions people may have about Scalars Vectors and Matrices.

Corrections, suggestions please!

I decided to add a section on the worn logarithm book, and found that Simon Newcomb actually discovered that!

See my revised version (use refresh): First Digits Rule

Thanks Guys!

**MathsIsFun**- Replies: 8

A new page, on "Benford's Law": First Digits Rule

What do you think?

Thanks!

Great, will add : and define a Universal Set for the Complement example.

Has anyone else seen I used for irrationals?

Good point, will amend.

**MathsIsFun**- Replies: 11

A new page: Set Symbols

What do you guys think of it? Any mistakes?

Fine, thanks. Blue. Yes.

And you?

Thanks Ganesh, Bob, Bobby!

chooipian wrote:

Standard Form and Scientific Notation?

Thanks, will add.

bobbym wrote:

...what do they use for the other two? Boiled Or Denatured Makes Alcohol Sweeter? ...

Funny! But a good point, it would be nice to have one for BODMAS and BEDMAS.

**MathsIsFun**- Replies: 7

A new page: Math vs Maths ... and more

Good page? Any mistakes? Do you have your own thoughts on this?

And any more examples for the second half would be appreciated.