A dotted note is worth one and a half times the worth of the same note without the dot.
eg. a crotchet is worth 1 beat so a dotted crotchet is worth 1 and 1/2 beats.
or, a quaver is worth 1/2 a beat so a dotted quaver is worth 3/4 of a beat.
the second dot adds one quarter of its value
A first dot adds one half the duration of the given note. A second dot adds one quarter of the given note (or one half the value contributed by the first dot). A third dot adds one eighth of the value of the given note (or one half the value contributed by the second dot).
half the regular value
More information is needed. The denomination and location of the dot.
Anything with a dot is increased by half of the note's value. So if a note is worth 2 beats and it has a dot, then the dot is 1 which then makes the dotted minim 3 beats.
Adding a dot to a note increases its duration by half its value.
If the inequality includes 'or equal' then use a solid dot [the value is included]. If it doesn't use 'or equal' then use the open dot.
Dot plot
tenths, i think
The dotted minim is a minim note in which the time value is extended by a half of its value by a dot.
The dot at the right of a half note makes the half note one beat longer. The dot makes the note to the left of the dot half of the note value longer. For example a quarter note dot is one and a half beats in 4/4 time.
There is a method called dot convention which is used in transformers. the dot shows the direction of current flowing through the coil and whether the value of mutual inductance thus produced will be positive or negative.