Question 65627
Geometry. For the floor plans given in exercise 27, determine whether the side through the points (2,3) and (11,6) is perpendicular to the side through the points (2,3) and (8,21).
m[(2,3) and (11,6)] = (6 - 3)/(11 - 2) = 3/9 = 1/3
m[(-3,18) and (8,21)] = (21 - 18)/(8 + 3) = 3/11
They are not parallel.