# SOLUTION: find the obtuse angle between the two lines having m1=7 and m2=-3 for slopes?

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 Question 523250: find the obtuse angle between the two lines having m1=7 and m2=-3 for slopes?Answer by Alan3354(30993)   (Show Source): You can put this solution on YOUR website!find the obtuse angle between the two lines having m1=7 and m2=-3 for slopes? ----------- The slope is the tangent of the angle between the line and the x-axis. Arctan(7) =~ 81.87 degs Arctan(-3) =~ 71.57 degs -------- The obtuse angle = 81.87 + 71.57 = 153.4 degs