How to Calculate Reactions and Forces in a Pin Jointed Frame?

[warrio1010]

Homework Statement
[PLAIN]http://img847.imageshack.us/img847/1704/pinjointed.png
Calculate the reactions at A and E and the forces in all members.

The attempt at a solution

At a loss regarding the reactions, tried equating vertical and horizontal.
As for the members I guess its just a case of working from the reaction values and using sin and cos but also can't get my head around this.

Any methods/pushes in the right direction much appreciated.

 

[pongo38]

In 2-dimensional work, as this one is, how many equations are there of static equilibrium? And what are they?

 

[warrio1010]

sum of v=0 and sum of horiz=0
?

 

[SteamKing]

Don't forget the sum of the moments = 0.

 

[warrio1010]

I have V_A as 10 but can't work out the other two, the equation would suggest that H_E-H_A+5=0 which leaves two unknowns so I'm stuck with that.

 

[PhanthomJay]

You are forgetting about the 3rd equation of equilibrium alluded to in the prior responses.