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

If two lines are parallel, the angle of apposition is equal. If two lines are parallel, the angle of internal error is equal. True proposition

The inverse proposition of the proposition "two straight lines are parallel and the same angle is equal" is______ ．

∵ the condition of the original proposition is: two straight lines are parallel, and the conclusion is: the same position angle is equal. ∵ the inverse proposition is: the same position angle is equal, and two straight lines are parallel

If two lines are parallel, the converse proposition of equal angle

If the angles are equal, the two lines are parallel
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1. The converse proposition of the proposition "equal angle, parallel two lines" is as follows:______ ．
2. 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
3. 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 =?
4. 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
5. For the regular triangle ABC whose side length is 6, establish the right angle coordinate system and write out the coordinates of each point
6. 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
7. 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
8. 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
9. 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
10. Given a (- 2,4), B (6,8), find a point C on the x-axis, which is a triangle, ABC is an isosceles triangle
11. 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!
12. 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,
13. If a = B, then a = B (fill in "true" or "false") proposition, its inverse proposition is, it is (fill in "true" or "false") proposition
14. Original proposition: √ a ＞ B, then a ＞ B (write its inverse proposition, no proposition, inverse no proposition)
15. 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
16. 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
17. 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
18. RT, in triangle ABC, ab = AC = 10, point D on BC, de parallel AC, DF parallel AB, find the perimeter of quadrilateral AEDF
19. It is known that: as shown in the figure, point D is a point on the edge AC of △ ABC, passing point D makes de ⊥ AB, DF ⊥ BC, e and F are perpendicular feet, then passing point D makes DG ∥ AB, intersecting BC at point G, and de = DF. (1) prove: DG = BG; (2) prove: BD bisects EF vertically
20. As shown in the figure, in △ ABC, ∠ B = 90 °, ab = 3, AC = 5, fold △ ABC so that point C coincides with point a, and the crease is De, then the perimeter of △ Abe is______ ．