Find the area of the triangle formed by the points (8, -5), (-2, -7) and (5, 1) by using Heron’s formula.

Find the area of the triangle formed by joining the mid-points of the sides of the triangle whose vertices are (0, -1), (2, 1) and (0, 3). Find the ratio of this area of the area of the given triangle.

Find the area of the quadrilateral whose vertices, taken in order, are (-4, -2), (-3, -5), (3, -2) and (2, 3)

Find the slope of the line passing the two given points

(4, -8) and (5, -2)

Find the slope of the line passing the two given points

(0, 0) and