Centre line

The straight line from A to C that divides the arena into two equal halves.

In the arena

Small arena 20 x 40 m: Centre lineThe straight line from A to C that divides the arena into two equal halves.ACKEHFBMDXG
Small arena 20 x 40 m
Large arena 20 x 60 m: Centre lineThe straight line from A to C that divides the arena into two equal halves.ACKVESHFPBRMDLXIG
Large arena 20 x 60 m
  • Ridden line
  • Start point
  • Letter

The geometry

The straight line connecting the midpoints of the two short sides, from A to C, running through D, X and G (in the large arena A-D-L-X-I-G-C). X lies exactly in the centre.

Good to know

Every test begins by entering on the centre line at A, usually with a halt at X. The line divides the arena into a left and a right half.

Discover more

20-metre circleVolteFigure of eightSerpentineChange of rein across the diagonalHalf circleTest your knowledge in the quizBack to arena and figures

Sources: United States Dressage Federation (USDF) · Federation Equestre Internationale (FEI) · Equine World UK.