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Judge true and false propositions, and ask experts to give directions on teaching methods. The seventh grade, the second volume of mathematics is urgent
A pair of vertex angles are equal (V)

B congruent angles are equal (x: assuming two straight lines are parallel)

Complementarity of two acute angles of C- right triangle (V)

The sum of the outer angles of the D triangle is equal to 360 (V).

This is not difficult, the key is to do a good job in textbook knowledge.

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