Given the triangle P(A1,A2,A3), A1=(-2,0), A2=(2,0), A3=(0,2). Find three half planes H1,H2,H3 such that

P(A1,A2,A3) = H1∩H2∩H3

Give only graphical evidence.

Ok so the triangle looks like an ordinary isosceles type triangle. Is this just asking for 3 half planes and those half planes are just the lines of each side of the triangle. Any answer will be appreciated.