help please?

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Screen%20Shot%202014-08-05%20at%206.26.4
Aug 6th, 2014

Measure of angles 16, 20 and 11 is 180 degree since they are three internal angles of a triangle.

So to find the measure of angle 11 we can add the other two angles and then subtract sum from 180.

Measure of angle 11 = 180 –(84 + 40) = 56 deg.

Hope this helps.
Aug 6th, 2014

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Aug 6th, 2014
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Aug 6th, 2014
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