Find the measure of angle Y.
A.115
B.65
C.43
D.22

Question

anonymous · Answer

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anonymous · Answer

Sum of angles in a triangle = 180 degrees. 

the last unknown angle in the triangle = 180 - 43 - 22= 115 degrees

Sum of angles on a line = 180 degrees

angle y = 180 - 115 = 65 degrees.

anonymous · Answer

i dont understand what you wrote

anonymous · Answer

Okay note that the triangle has 3 angles in it.
Know that the sum of angles in a triangle is 180 degrees in total. 
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So 180 - 43 - 22 = 115. This is the value of the 3rd angle in the triangle. 

This 115 degrees angle is lying on a straight line together with angle y, the one you are finding.

anonymous · Answer

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The sum of 115 and angle y is equal to 180 degrees.

So subtracting 115 from 180, you will get 65 degrees. The value for angle y.