Object moving in equilateral triangle - magnitude of acceleration

[physos]

Homework Statement

An object moves around a equilateral triangle with a constant speed (magnitude of velocity is constant) of 22.3 m/s. If it moves from the starting to ending point (as shown below) in a time of 12.69 seconds, what is the magnitude of the average acceleration vector in m/s2?

Homework Equations

V$$\Delta$$V= (rFx-rix/delta(t)) - (rfy-riy\delta (t))

The Attempt at a Solution

 

[iRaid]

Break the vector into x and y components then use the equation:
(delta)y=v0t-(1/2)gt^2

 

[physos]

Thanks! i figured out the answer.. its 3.04