Beibei and Jingjing play the game of "stone, scissors and cloth". What's the possibility of Jingjing winning () A. 12B. 13C. 15D. 19

1 △ 3 = 13; answer: Jingjing's winning probability is 13

Xiaojun, Xiaoyan and Xiaoming are classmates. Assuming that the three of them have the same possibility of arriving at school in the morning, the probability of the event "Xiaoyan arrives at school earlier than Xiaoming" is zero______ ．

The probability of Xiaojun, Xiaoyan and Xiaoming arriving at school in the morning is the same, the probability of Xiaoyan and Xiaoming arriving at school first is equal, and the probability of Xiaoyan arriving at school earlier than Xiaoming is 12

Use scissors to cut one corner of a square piece of paper. How many corners are left? Can you make six corners after cutting?

Use scissors to cut one corner of a square piece of paper, leaving 3, 4 or 5. After cutting the unfolded paper, you can't leave 6 corners on the paper, unless you fold it

A piece of square paper has four corners. How many corners are left after one corner is cut off

A piece of square paper, cut off a corner, how many corners are left

If you cut a corner along the diagonal line to form a triangle, the sum of the inner angles is 180 degrees. If you cut a corner from the vertex to the opposite side to form a right angled trapezoid, the sum of the inner angles is 360 degrees. If you cut a corner along two adjacent sides to form a Pentagon, the sum of the inner angles is 540 degrees

A square paper, cut a corner, the remaining corner, how to cut?

Fold the square along the diagonal line, and then cut it from a vertex of the triangle along the direction of the curve. One vertex is cut off, and the other part is the curve

As shown in the figure, if you cut off the four corners (shadow part) of the square ABCD with side length of 1, you will get a quadrilateral a1b1c1d1. How can you cut it so that the remaining figure is still a square, and the area of the remaining figure is 59 times that of the original square, please explain the reason. (write the proof and calculation process)

A1b1b1c1d1 is a square, and A1B1 = b1c1 = c1d1 = d1a1, \a1b1 = b1c1 = c1d1 = d1a1, \\\a1a1b1 = d1a1, \\a1a1b1 = B1a1, \\\\a1b1 = b1c1 = d1a1, \\aa1d1 + \\\1a1a1 \\1a1 \\\\\\\\\\\\\\\\\\\\\\\accordingto Pythagorean theorem, a1d12 = X 2 + (1-x) 2, square a1b1c1d1 area = a1d12 = x2 + (1-x) 2 = 59, the solution is x = 13, x = 23

As shown in the figure, an equilateral triangular piece of paper is cut off to get a quadrilateral, then ∠ α + ∠ β in the figure=______ ．

∵ the vertex angle of equilateral triangle is 60 °, the sum of two base angles = 180 ° - 60 ° = 120 °, and the answer is: 240 °

If you cut off one corner of a square, the remaining figure has only three corners, right

Three, four, five

Cut off a corner of a square, the figure may be a triangle, a quadrilateral, a Pentagon and a hexagon
A. ①②B. ③④C. ②③D. ①②③

When the section is a straight line passing through two vertices of the diagonal of the square, the remaining figure is a triangle; when the section is a straight line passing through a group of opposite sides of the square, the remaining figure is a quadrilateral; when the section is a straight line passing through only a group of adjacent sides of the square, the remaining figure is a Pentagon; so the correct one is ①, ②, ③, so select D

Beibei and Jingjing play the game of "stone, scissors and cloth". What's the possibility of Jingjing winning () A. 12B. 13C. 15D. 19