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What is the title of the math test paperNo. 14 in the senior high school entrance examination in Jinshan District10?
Solution:? As shown in the figure, A and B are parallel, so the angles of 1 and 3 are equal.

And 2 and 3 complement each other? That is, angle 2+ angle 3= 180 degrees?

So ∠ 2 = 140

Wrong answer?

draw

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