The second semester of sixth grade mathematics Such as the title
Give me the title
RELATED INFORMATIONS
- 1. In a checkerboard, draw a pattern whose area is 56% of the checkerboard paper. What percentage of the remaining checkerboard?
- 2. A circle is an axisymmetric figure, and each axis is its axis Is that right or wrong?
- 3. Given that a is the unit vector in the plane, if B satisfies b * (a-b) = 0, then what is the value range of | B | It is helpful for the responder to give an accurate answer
- 4. As shown in the figure, △ ABC, D and E are the midpoint of BC and AC respectively. BF bisects ∠ ABC and intersects de at point F. if BC = 6, the length of DF is______ .
- 5. On the cosine value of the angle between line and plane in space by vector For the problem of the angle between a line and a plane in space, can we first find the normal vector of a line, then find the normal vector of a surface, and then find the angle between two normal vectors, and then find the cosine of the angle complementary to the angle? Or do we first find the normal vector of the surface, and then find the angle between the normal vector and the line vector?
- 6. As shown in the figure, AE ⊥ CE in E, EB ⊥ AC in B, BD ⊥ AE in D, try to compare the size of AB, AC, ad, AE?
- 7. For example, if I give the coordinates of two vectors a and B, how can I find a · B? Can I directly multiply them by coordinates?
- 8. As shown in the figure, △ ABC is an equilateral triangle, and points D, e and F are points on line AB, BC and Ca respectively. (1) if ad = be = CF, is △ def an equilateral triangle? (2) if △ DEF is an equilateral triangle, is ad = be = CF true? Try to prove your conclusion
- 9. Cosine value of a / 2 + C = 4 / 5, area of triangle ABC = vector AB * vector BC, find cosine value of A Who will help solve the problem of grade one in senior high school!
- 10. Direct triangle, three sides are arithmetic sequence, known area is 12. Find perimeter
- 11. In a plan with a scale of 1:500, the perimeter of a rectangular classroom is 10 cm. The ratio of length to width is 3:2. Find the area of the classroom
- 12. My answer has been torn. Please help me My answer has been torn. Please help me! It's too difficult!
- 13. Is the star round or the moon round
- 14. 1+a/(a-b)(a-c) +1+b/(b-c)(b-a) +1+c/(c-a)(c-b)
- 15. If the subject is the object of the action represented by the gerund, the gerund uses the passive voice Please give me a simple example and explain which is the subject and which is the gerund
- 16. Passive voice in junior high school English
- 17. Which words can't be used in the passive voice in junior middle school English
- 18. What are the words of proximity principle in junior high school English
- 19. What are the words in line with the principle of proximity in junior high school English? For example, there be
- 20. Some word type changes in junior high school English 1,the film()for nearly fifteen minutes when i got to the cinema.(last) 2,he said he became ()in physics(interest) 3,he has ()control of the company with the help of his assistants.(gain)