Question

During an archaeological dig, a coordinate grid is laid over the site to identify the location of artifacts as they are excavated. During a dig, three corners of a triangular building have been partially unearthed at (-1, 6), (4, 5), and (-3, -4).



If each square on the grid measures one square foot, estimate the area of the floor of the building.
a. about 50ft2 c. about 10ft2
b. about 26ft2 d. about 70ft2