1. The problem statement, all variables and given/known data Evaluate a line integral where C is the triangle with the vertices (0,0), (1,0) and (1,2). [Green's Theorem not allowed] I am omitting the integral expression as I am having trouble with setting up the r(t) expressions for each C. 2. Relevant equations r(t) = (1-t)r0 + tr1 (o≤t≤1) 3. The attempt at a solution So the way to tackle this problem would be to get the line segments C1, C2 and C3, C1 from (0,0) to (1,0), C2 from (1,0) to (1,2) and C3 from (1,2) to (0,0). To get the segments, the aforementioned equation would be used. C1 was easy enough, with r0 being <0,0> and r1 being <1,0>. r(t) was found to be <t,0>. C2 is where I began having problems. Calculating r(t) with r0 = <1,0> and r(1) = <1,2> gave the r(t) expression <1, 2t>. When I drew out the graph, I could see that it should be <0, t>. So my question is, what am I doing wrong? And if I see a similar problem where I can see a visible straight horizontal or vertical line, I should just go with a <0, t> or a <t, 0> expression?