Area for this triangle and explanation

the base ( line across the bottom) is 4 units long

 the height ( the vertical line on the left side) is 3 units tall

 area = 1/2 x 4 x 3  = 1/2 x 12 = 6 units^2

The questions asked to name a particular points that contains x and y coordinates.
distance = (x -(-1))2 + (y -5)2    = 2
distance = (x +1))2 + (y -5)2    = 2
                => (√(2) -1,5)
                =>  (-1, 5 + √ (2)
                => (0, 4)
                => (0, 6)Thus, here are the lists of possible points. (0, 4) and (0, 6).