Ratio

Harmonic ratio geometry

Harmonic ratio geometry

Harmonic construction, in projective geometry, determination of a pair of points C and D that divides a line segment AB harmonically (see Figure), that is, internally and externally in the same ratio, the internal ratio CA/CB being equal to the negative of the external ratio DA/DB on the extended line.

Music Is there out any good app for learning writing and reading sheet music (for singing)?
Is there out any good app for learning writing and reading sheet music (for singing)?
Simply Piano by JoyTunes is one of the widely used and most popular music learning application available on both iOS and Android platforms. Here you c...
String Rare abbreviation in Haydn String Quartet
Rare abbreviation in Haydn String Quartet
What is the form of Haydn string quartet?What does Op 76 No 3 mean?How many string quartets does Haydn have?What is the nickname for Haydn's quartet O...
Note Arrow over notes
Arrow over notes
This is the symbol that most musicians mean when they say accent mark. It indicates that the marked note should have an emphasized beginning and then ...