If △ ABC ≌ △ DEF is known, if △ ABC and perimeter are 38, ab = 14, AC = 8, try to find the length of EF respectively 5 yuan fortune reward

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• 1. ① In △ ABC and △ def, AB / de = BC / EF = AC / DF = 4, find the perimeter ratio of △ def, M: n = 1 / 7:1 / 6, N: T = 1 / 4:1 / 3, then M: n: T =? ① In △ ABC and △ def, AB / de = BC / EF = AC / DF = 4, find the perimeter ratio of △ def ② M: n = 1 / 7:1 / 6, N: T = 1 / 4:1 / 3, then M: n: T =?
• 2. As shown in the figure, in the plane rectangular coordinate system, the length of ABC side of equilateral triangle is 3 / 2, and BC side is on the negative half axis of X, e (0, a), f (B, 0) If the equilateral triangle ABC starts from the origin O and moves to the left, when B and f coincide, AC intersects EF at N and the length of CN is calculated (2) In ABC motion of equilateral triangle, AB intersects EF with M. when the area of triangle AOM is √ (3) / 2, m coordinate is obtained
• 3. For the regular triangle ABC whose side length is 6, establish the right angle coordinate system and write out the coordinates of each point
• 4. Given that point a (0, - 3), B (0,5)), point C is on the x-axis, and the area of triangle ABC is 20, find the coordinates of point C
• 5. In the plane rectangular coordinate system, given that point a (2,0), point B (4,0) and point C are on the Y axis, if the area of triangle ABC is 5, find the coordinate of point C
• 6. If a (- 2,0) and B (- 4,5) are known in the plane rectangular coordinate system, find a point C on the x-axis, so that the triangle ABC = 6
• 7. As shown in the figure, in the plane rectangular coordinate system, the side ab of triangle ABC is on the x-axis, a (- 2,0), C (2,4), s triangle = 6, find the coordinates of point B
• 8. Given a (- 2,4), B (6,8), find a point C on the x-axis, which is a triangle, ABC is an isosceles triangle
• 9. In the plane rectangular coordinate system, if the coordinates of point a are (1,1), the coordinates of point B are (11,1), the distance between point C and line AB is 4, and △ ABC is a right triangle, then the point C that satisfies the condition has two points______ One
• 10. As shown in the figure: O is any point in △ ABC, a '. B'. C 'is OA.OB.OC Is triangle ABC similar to triangle a'b'c '? Why?
• 11. The converse proposition of the proposition "equal angle, parallel two lines" is as follows:______ ．
• 12. Write down the inverse proposition of the following proposition, and judge whether it is true or false. 1. The same position angle is equal, and the two lines are parallel. 2. The inner stagger angle is equal, and the two lines are parallel
• 13. Let a and B be the lengths of two right angles of a right triangle and (A2 + B2) (3 under the root of A2 + b2-4) = - 12, then the value of A2 + B2 is Thank you for your correct answer!
• 14. If three line segments a, B and C satisfy a square = C square - b square, is the triangle formed by these three line segments a right triangle? Why? Please explain the process and reasons,
• 15. If a = B, then a = B (fill in "true" or "false") proposition, its inverse proposition is, it is (fill in "true" or "false") proposition
• 16. Original proposition: √ a ＞ B, then a ＞ B (write its inverse proposition, no proposition, inverse no proposition)
• 17. Triangle ABC, AC = BC, angle c = 90 degree, point D on BC, fold triangle ACD along ad, point C just falls on point E on AB, if AB = 6cm Finding the perimeter of triangle deb The picture can't be sent out
• 18. As shown in the figure, in RT △ ABC, ∠ C = 90 °, AC = 4cm, BC = 3cm, now fold △ ABC to make vertex A and B coincide, then the length of crease De is () cm A. 52B. 154C. 158D. 5
• 19. As shown in the figure, in △ ABC, de ‖ BC, ad: DB = 3:2 (1) find the value of DEBC; (2) find the value of bced & nbsp; of s △ ADEs quadrilateral
• 20. RT, in triangle ABC, ab = AC = 10, point D on BC, de parallel AC, DF parallel AB, find the perimeter of quadrilateral AEDF