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To find the measure of angle J, we need to use the fact that the angles of a triangle sum up to 180 degrees.
Let's denote angle J as x.
Therefore, we have:
x + 25.5 + 120.2 = 180
Combine like terms:
x + 145.7 = 180
Subtract 145.7 from both sides:
x = 180 - 145.7
x = 34.3
The measure of angle J is therefore 34.3 degrees.
So the correct answer is D) 34.3°