A hemiola is where the music feels like it is in 2/4 even though it is written in 3/4.

This is a hemiola demonstrated on a dumkit pattern

Hemiola

A hemiola is where the music feels like it is in 2/4 even though it is written in 3/4.

In Baroque music it was fashionable to use a hemiola when approaching a cadence.

Handel uses a hemiola in ‘And the Glory of the Lord’. It is first heard in bars 9-10 of the introduction

Hemiola

In bars 9-10 you can see that although the music is in 3/4 the chords change every two beat. This is especially clear if you disregard the melody

Hemiola

D major

Hemiola

A majorE major

E major

V IIV V