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**1. Homework Statement**

"PRQSTU is a regular hexagon of side 2 units. PQ,QR and RS represent vectors

**a**,

**b**and

**c**respectively. Find the value of

**a.(b + c)**

The hexagon is a regular hexagon starting at the far left (ie pointing left) with P then anti clockwise through U at the top left.

**2. Homework Equations**

None that I can think of.

**3. The Attempt at a Solution**

I really don't know where to start. I've guessed that

**a**(PQ) = -

**c**. But I don't know where to go from there and now I'm really confused.

Any help greatly appreciated.