What is the full English name of NBA, PRC, VOA, EQ and WTO
NBA Basketball Association (National Basketball Association) prcpeople's Republic of China (people's Republic of China) VOAVoice of America (voice of America) eqemotional quotient (emotional intelligence) wtoworld Trade Organization (World Trade Organization)
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- 1. As shown in the figure, in △ ABC, the bisector of ∠ a = 90 ° and ∠ B intersects AC at D, ah and DF are perpendicular to BC, h and F are perpendicular feet
- 2. As shown in the figure, in △ ABC, the bisector of ∠ a = 90 ° and ∠ B intersects AC at D, ah and DF are perpendicular to BC, h and F are perpendicular feet
- 3. As shown in the figure, in △ ABC, the bisector of ∠ a = 90 ° and ∠ B intersects AC at D, ah and DF are perpendicular to BC, h and F are perpendicular feet
- 4. RT triangle ABC, ∠ a = 90 °, bisector of ∠ B intersects AC at D, vertical line from a as BC intersects BD at e, and vertical line from D as DF, so aefd is proved to be diamond
- 5. As shown in the figure, in RT △ ABC, the bisector of ∠ a = 90 °, the bisector of ∠ B intersects AC at e, the height ah on the side of intersecting BC is at D, DF / / BC intersects AC at F through D, and the verification is: AE = FC
- 6. Cdef is the inscribed square of RT triangle ABC, BC = 2, AC = 1, find the square cdef area
- 7. In △ ABC, ∠ C = 90 °, D, e and F are points on edges AB, AC and BC respectively, and the quadrilateral decf is a square if ad = 7
- 8. If ad = 6 and BD = 5, the sum of areas of △ ADF and △ BDE can be obtained
- 9. In the triangle ABC, ∠ ACB = 90 ° points D and E are the middle points of AC and ab respectively, point F is on the extension line of BC, tangent ∠ CDF = ∠ a, prove that decf is ‖ quadrilateral
- 10. In △ ABC, ∠ BCA = 90 degrees, D and E are the middle points on the sides of AC and ab respectively, f is on the extension line of BC, ∠ CDF = ∠ a It's a proof
- 11. It is known that in △ ABC, ab = 20, AC = 15, and the height of BC is 12, then the length of BC is______ .
- 12. How to use the inverse function method to find the range of y = CX + D / ax + B (a ≠ 0)
- 13. The range of function y = x ^ 2-2x + 2, X ∈ [2,7] is
- 14. Let f (x) = ax & # 178; + BX + C (a > 0), and f (1) = - A / 2 (1) Prove that the function f (x) has two zeros. (2) let X1 and X2 be the two zeros of the function f (x), and find the absolute value range of x1-x2. (3) prove that the function f (x) has at least one zeros in (0,2) Is to find the value range of the absolute value of x1-x2
- 15. The relationship between the absolute value of a number and the opposite number is expressed in symbolic language Be correct and positive
- 16. When calculating 25 + A, Xiao careless mistakenly regards + as a - sign and gets 17, then the correct answer to 25 + A is ()
- 17. Simple calculation of 100 * 7.9 + 184 * 2.1 + 84 * 2.9
- 18. K in y = KX + B is the slope. What is the slope
- 19. Given that point a (- 3,2a-1) and point B (B, - 3) are symmetric with respect to the origin, what is the coordinate of the symmetric point P 'of point P (a, b) with respect to the y-axis?
- 20. If there are only three positive integer solutions to the inequality 2x-m ≤ 0, then the range of M is?