Given that the perimeter of the triangle is 5a-b, the length of the first side is 3A + 2B, and the length of the second side is twice that of the first side, which is a-2b + 2 less than that of the first side, the length of the third side can be obtained

Draw four arbitrary points on the paper. If the four points are connected to form a graph, there will be at most several triangles in the graph

8
Four small ones, four of them

Xiaosheng drew four points on the paper. If the four points were connected to form a figure, how many triangles would there be in the figure? Please draw a picture to explain

(1) When four points have two points in a straight line, connect the four points to form a quadrilateral. As shown in the figure, the number of triangles divided by the two diagonals of the quadrilateral is: 4, 1 and 2, 2 and 3, 3 and 4, 4 and 1. The number of triangles formed by each two small triangles is

RELATED INFORMATIONS

1. Xiaowan drew four points on the paper. If the four points were connected to form a figure, how many triangles would there be in the figure?
2. Xiaosheng drew four points on the paper. If the four points were connected to form a figure, how many triangles would there be in the figure? Please draw a picture to explain
3. Fill 10, 15, 20, 30, 40 and 60 in the circle below to make the product of three numbers on each side of the triangle equal
4. As shown in the figure, the upper bottom of a trapezoid is 5cm, and the lower bottom is 8cm. The height of a triangle is 4cm. Divide the triangle into two parts with equal area, a and B, and calculate the area of the shadow part
5. It is known that a, B and C are the three sides of the triangle ABC, and the positive and negative values of the square of (A-C) - B are judged
6. If the lengths of three sides of a triangle are three continuous natural numbers, and its perimeter m satisfies 10 < m < 22, then the triangle has () A. 2 b. 3 C. 4 d. 5
7. It is known that in the isosceles triangle ABC, the center line BD on a waist AC divides the circumference of the triangle into two parts 9cm and 15cm, and calculates the waist length and the bottom length of the triangle
8. Given the height of isosceles triangle is 6 and 8, how much is the circumference?
9. The circumference of an isosceles triangle is eighteen centimeters, and the ratio of the two sides is five to two. How many centimeters is the length of the bottom side
10. Known isosceles triangle on both sides of 5 cm, 7 cm, find perimeter
11. The first side of a triangle becomes {2a-b} cm, the second side is {a = 2B} cm longer than the first side, and the third side is less than 2 times of the first side by B. calculate the perimeter
12. If one side of a triangle is (2a-b) cm long, the second side is (a + b) cm longer than the first side, and the third side is 2 times less than the first side by B cm (1) What's the circumference of this triangle in centimeters? (2) If the triangle is isosceles triangle and the second and third sides are equal, the perimeter of the triangle when B = 2 is obtained
13. If the hypotenuse BC of the right triangle ABC is 1 and the circle O is the inscribed circle of the triangle ABC, then the maximum radius of the circle O is 0
14. Given that the circle O is the circumscribed circle of triangle ABC, and the side length is 6, the radius of circle O is calculated
15. If the inner and outer centers of a triangle coincide, then the triangle is, and the ratio of the radius of its circumscribed circle to the radius of its inscribed circle is
16. If the lengths of the two right sides of a right triangle are 3 and 4 respectively, what is the radius of its inscribed circle
17. As shown in the figure, in △ ABC, the bisector of ∠ ABC and ∠ ACB intersects at point I. according to the following conditions, calculate the degree of ∠ BIC 1. If ∠ ABC = 60 °, ACB = 70 °, then ∠ BIC=____ 2. If ∠ ABC + ∠ ACB = 130 °, then ∠ BIC=____ 3. If ∠ a = 50 °, then BIC=____ 4. From the above calculation, what is the quantitative relationship between ∠ A and ∠ BIC? Please prove it
18. In the triangle ABC, BD and CE are the midlines on the sides AC and ab. BD and CE intersect at the point O. what is the relationship between the length of Bo and OD? For detailed explanation, do not run to copy, correct answer, I can add 20-50 points to see the picture
19. As shown in the figure, in △ ABC, ab = AC, D is a point on the edge of BC, with AB and BD as adjacent sides, make parallelogram ABDE and connect AD and EC
20. As shown in the figure, in the triangle ABC, D, e and F are the midpoint of three sides BC, AC and ab respectively. It is proved that the quadrilateral defb is a parallelogram