`stackrel(harr)(ab)` and `stackrel(harr)(bc)` form a right angle at point b. if a = (-3, -1) and b = (4, 4), what is the equation of `stackrel(harr)(bc)`?

Afarm is to be built in the shape of quadrilateral abcd, as shown below. all four sides are equal. a rhombus abcd is shown with diagonal ac equal to 15.5 feet and diagonal bd equal to 13.2 feet. what is the area of the farm? pleas only pick from the 4 below 62 square feet 52.8 square feet 57.4 square feet 102.3 square feet