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# help

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Lines \(m_{1},m_{2},l_{1},l_{2}\),  and  are coplanar, and they are drawn such that \(l_{1}\) is parallel to \(l_{2}\), and \(m_{2}\) is perpendicular to \(l_{2}\). If the measure of angle 1 is 50 degrees, what is the measure in degrees of angle 2 in the figure below?

Guest Aug 1, 2017
edited by Guest  Aug 1, 2017
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#1
+5552
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Here I labeled angle 3 .

Since  l1  and  l2  are parallel...

m∠2  =  m∠1 + m∠3          Imagine "sliding over"  l2  onto  l1 to see why this is.

The problem says that  m∠1 = 50°  .

m∠2  =   50°  + m∠3          l1  and  l2  are parallel, and  m2  is perpendicular to  l2  .

So... m2  is perpendicular to l1 . This means  m∠3 = 90º  .

m∠2  =   50°  +  90º

m∠2  =  140°

hectictar  Aug 1, 2017
edited by hectictar  Aug 1, 2017
edited by hectictar  Aug 1, 2017
#2
+211
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how did u post a priority question???

GirlsRbetteR  Aug 2, 2017
#3
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share the link on social media!

Guest Aug 2, 2017

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