1, (1) acute angle acute angle (2) acute angle acute angle acute angle acute angle.
2. Omission
3, obtuse right angle
4. Omission
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1, acute triangle 24, right triangle 16, obtuse triangle 352, diagonal diagonal height 3, connecting upper left and lower right, connecting lower left and upper right 4, and drawing the height on the side of BC through point A.
Summary report of kindergarten teachers following posts 1
The three-day follow-up of xx kindergarten is over. In these days of stud