A (traingle) with coordinates (-6,-2), (-4,-6) and (-2,5)

13. In the rectangular co-ordinate system, a triangle has vertices at (-6,-2), (-4,-6) and (-2,5). What is the area of the triangle? A. 12 sq units B. 15 sq units C. 18 sq units D. 21 sq units E. 30 sq units let the co-ordinates be: x1, y1 x2, y2 & x3, y3 so in this problem: x1= -6, y1 = -2 x2= ...