For which of the following meters does the conducting pattern look like a triangle?

a) 2/4
b) 3/4
c) 4/4
d) 4/8

Option B.

Explanation:

The shapes of the conduction patterns may be associated with geometrical forms, which may be very useful to learn them in a first approach.

the measure 2/4 looks like a small pipe or an inverted "J" letter.

The measure 3/4 looks like a 2/4 but more triangular, so this is the one that looks like a triangle.

The measure 4/4 looks like the 3/4, with a small loop in the bottom right,

the measure 4/8 looks like 4/4 but the loop is bigger and has more "jumps" that indicate each of the beats.