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finding the measure of angles in degrees

if b is 180 degree and c is 140 degree then what is a?

 

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Jackie

What are the angles part of?

If a triangle, then all 3 angles of a triangle must equal 180 degrees.

re: angle b having measure 180, that makes it essentially a straight line.

 

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1 Answer

It sounds like on the opposite sides of a straight line are three angles, one lone angle (180 degrees) on one side and two angles (supplementary angles that together equal 180 degrees) on the other. So if one of the angles is 140 degrees then you can find the other angle by subtracting from 180:

180-140=40

angle A is 40 degrees

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