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

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**warparty****Member**- Registered: 2012-11-06
- Posts: 2

does face and side of a figure mean the same thing?

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,426

hi warparty,

Welcome to the forum.

I would use side for a 2-D shape and face for a 3-D object.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**warparty****Member**- Registered: 2012-11-06
- Posts: 2

Thanks so much. I know it was a simple question, especially after viewing all the complex ones on the forum. But, it's little things like that that are kind of skipped over, but become cummulative with other problem areas. A recent example was a quiz I found on Roman Numerals. You could know the meaning of them, but you would have to be instructed how to represent 9.

And your Galileo quote so appropos after my first meeting today with my 4th grader. I knew I could show her a whole lot she already knew, but did not realize how it was "packaged" on standardized tests, e.g., the property of zero.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,240

Hi warparty;

I know it was a simple question, especially after viewing all the complex ones on the forum.

There are no simple questions or I have missed them. Welcome to the forum.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

**Online**

**Calligar****Member**- Registered: 2011-09-24
- Posts: 234

Oh, didn't realize you were a new member. Your question already seems answered, so I just have one thing to say.

Welcome to the forum!

Life isnt a simple Math: there are always other variables. -[unknown]

But Nature flies from the infinite, for the infinite is unending or imperfect, and Nature ever seeks an end. -Aristotle

Offline

**angie38****Member**- Registered: 2012-11-15
- Posts: 1

hi..this is my first message...please help me answer this problem ...

Find the equation of the line passing through (-2,-2) and perpendicular to the line 2x - 3y + 5 = 0..kindly provide me the steps in solving this problem..I hope i can post another one...much thanks

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,240

Hi angie38;

Welcome to the forum.

First find the slope of the line you are given.

solve for y

The slope of this line is 2 / 3. For a line to be perpendicular to this one its slope must be a negative reciprocal. So therefore the slope of the new line is -(3 / 2).

The general form of the line you want is:

since we know the slope m

You should be able to solve for b and get the equation of the line that is perpendicular to the given one and passes through the point (-2,-2).

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

**Online**

Pages: **1**