Let C be the triangle in the plane from (0,0) to (1,1) to (0,1) back to (0,0). evaluate the line integral of f along C if f(x,y)=(x+2y). attempt: C1: x=t y=t ds=root(1)dt, integrated t+2t from 0 to 1 to get 3/2 C2: x=-t ds=root(1)dt, integrated -t from -1 to 0 to get 1/2 C3: y=-t, ds=root(1)dt integrated -2t from -1 to 0 to get 1. added up 3/2, 1/2, and 1 to get the wrong answer. the correct answer is (1/2)(3root2 + 7) looks like im parametizing completely wrong. so how do i go about this? thanks.