Answer:
39° is your answer
Explanation:
The sum of the interior angles for a triangle is 180°
Set all the interior angles equal to 180
39 + 102 + x = 180
Simplify.
x + 141 = 180
Isolate the x. Subtract 141 from both sides
x + 141 (-141) = 180 (-141)
x = 180 - 141
x = 39
39° is your answer
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