Answer:
a = 70°
Explanation:
a and 110 form a straight angle, thus
a + 110 = 180 ( subtract 110 from both sides )
a =70
Angle a and 110 are supplementary, which means they add to 180 degrees
a+ 110 = 180
Subtract 110 from each side
a+110-100=180-110
a = 70
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