Find the angle of intersection when the line through the points $(3,4)$ and $(-5,0)$ intersects the line through $(0,0)$ and $(-5,0)$.
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2$\begingroup$ please consult our FAQ item on how to ask homework questions. In particular, please do not ask questions in the imperative, and please show your work. $\endgroup$– Willie WongApr 23, 2011 at 12:44
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1 Answer
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So we have points (3,4) and (-5,0) . Its equation of line would be 2y = x + 5
The other is (0,0) and (-5,0) . Its equation would be y = 0
Thus it is the x axis.
So basically since we observe that (-5,0) is the intersection point the question is to calculate the slope of second line..
Thus we get tan( theta ) = 1/2
and get theta = tan inverse(1/2) to get the acute angle of intersection....
