SOLUTION: let L1 and L2 be the line passing through (1,-2) and(4,1), and L2 is the line containing (2,4) and (6,5). Find it an angle between L1 and L2.

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: let L1 and L2 be the line passing through (1,-2) and(4,1), and L2 is the line containing (2,4) and (6,5). Find it an angle between L1 and L2.      Log On

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Question 370389: let L1 and L2 be the line passing through (1,-2) and(4,1), and L2 is the line containing (2,4) and (6,5). Find it an angle between L1 and L2.
Answer by Alan3354(69443) About Me  (Show Source):
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let L1 and L2 be the line passing through (1,-2) and(4,1), and L2 is the line containing (2,4) and (6,5). Find it an angle between L1 and L2.
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Slope of L1 = diffy/diffx = 3/3 = 1
Slope of L2 = 1/4
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The slope is the tangent of the angle between the line and the x-axis
L1 is 45º
L2 =~ 14º
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Angle between L1 & L2 = 31º (the acute angle)
It's also the supplement, 149º