How do I form special piano chords?

Q. specifically (add9) chords and ninth and 11th chords. Thanks in Advance.

A. add9 just means you add the 9th to the given chord. The 9th is the same as the 2. Imagine you just continued counting the notes of the major scale AFTER the octave.

So Cadd9 would be C E G D, Emin(add9) would be E G B F#, etc

Cadd9 is different than a simple C9. C9 indicates the presence of the flat 7th too (C E G Bb D)

Here's a link to a chord construction chart I made. It tells you the which notes are in various chords, along with a few different ways they may be indicated on a lead sheet.

http://a.1asphost.com/LukeSniper/ccc.html

It doesn't have anything about 11ths or 13ths, it should make sense how that works after looking at it. The only thing to point out is that C13 is 1 3 5 b7 9 11 13. Parentheses are often used to indicate alterations or additions to a given chord. So C9(b5) would be 1 3 b5 b7 9 and C7(11/13) would be 1 3 5 b7 11 13

Original Question

Which piano chord would this be...?

Q. I'm new to piano so I was wondering which chord would D-minor + A-minor + D-minor be?
And what are some ways to know which chord is which?

A. D minor and A minor ARE chords.

If you mean to say that you are playing the notes D A and D, then that's a kind D5. If you're really confused and think that minor is another word for sharp or flat, then it's either a D#5 or Db5.

If you are stacking 3 chords on top of each other, it's just a big Dm9.

The type of chord is determined by the relationships between the different notes. This is usually illustrated with interval values, starting with one moving up to seven (for each of seven letters), and sharp & flat signs. For example, a major chord has the notes 1 3 5 (each number corresponds to a note from the major scale). A dominant 7th chord has the notes 1 3 5 b7. A Minor 9 (Major 7) chord has the notes 1 b3 5 7 9. It's really not that complicated if you actually learn how it works.

Here's a little chart I made with a bunch of these "chord formulas"
http://a.1asphost.com/LukeSniper/ccc.html

Original Question

How to play these piano chords?

Q. it qould be better if you just told me all of them if thats possible:

Dm
G7
A7
E7
D7
B7
+ect.

i only know that ; Am = e, a,c & E = e, g(sharp), b & c= e,g,c , g = d, g, b.

thanks, i could not find it on google cause it just showed up as majors and all...;/

x

A. I'm still learning, but, this is what I know:

Do you mean d minor? And, is it just the basic chord? If so:

dm is: d, f, a. Inverted once: a, d, f, Inverted twice: f, a, d

D major: D, F#, A. Inverted once: A, D, F# Inverted twice: F#, A, D

G7 (major right?): G, B, D, F#

A7: A, C#, E, G#

E7: E, G# B, D#

D7: D, F#, A, C#

B7: B, D#, F#, A#

Your best bet is to learn the scales. A seventh chord is usually a basic chord with the seventh letter of the scale added to the end.

You can pick up some "cheat sheets" at music stores, and I would also think you can get theory books, which would help, if you're not taking lessons.

Original Question

Title : How do I form special piano chords?
Description : Q. specifically (add9) chords and ninth and 11th chords. Thanks in Advance. A. add9 just means you add the 9th to the given chord. The 9th...