As shown in the figure, △ ABC, ab = AC, D is the moving point on AB, DF ⊥ BC is at point F, and Ca extension line is at point E, (1) (2) when point D is on the extension line of Ba, other conditions remain unchanged. (1) is the conclusion still valid? Please give reasons

RELATED INFORMATIONS

• 1. As shown in the figure, abad = BCDE = ACAE, verification: △ abd ∽ ace
• 2. As shown in the figure, ab ⊥ AC, ab = AC, ad ⊥ AE, ad = AE
• 3. As shown in the figure, abad = BCDE = ACAE, verification: △ abd ∽ ace
• 4. As shown in the figure, abad = BCDE = ACAE, verification: △ abd ∽ ace
• 5. As shown in the figure, abad = BCDE = ACAE, verification: △ abd ∽ ace
• 6. As shown in the figure, △ abd and △ ace are equilateral triangles. What's the use of proving ad = AB and AE = AC in be = CD
• 7. It is known that in △ ABC, ∠ BAC = 120 ° with AB and AC as sides, positive △ abd and positive △ ace are made outward respectively, and M is in AD It is known that in △ ABC, ∠ BAC = 120 ° with AB and AC as sides, make positive △ abd and positive △ ace outward respectively, M is the midpoint of AD, n is the midpoint of AE, and P is the midpoint of BC. It is proved that MP = NP
• 8. As shown in the figure, it is known that CD is the height of AB side in △ ABC, and ⊙ o with CD as diameter intersects Ca at point E, and point G is the midpoint of AD. (1) prove that GE is the tangent of ⊙ o; (2) if AC ⊥ BC, AC = 8, BC = 6, find the length of tangent Ge
• 9. As shown in the figure, it is known that in △ ABC, ad and AE are the height and the median line on the edge of BC, ab = 9cm, AC = 7cm, BC = 8cm, respectively
• 10. In △ ABC, high AD and be intersect at h, and BH = AC, then ∠ ABC=______ ．
• 11. As shown in the figure, ad and AE are the height and middle line of the triangle ABC respectively, and ab = 8, AC = 5. What is the perimeter of the triangle Abe over the triangle ace? What is the relationship between the area of triangle Abe and triangle ace?
• 12. As shown in the figure, in △ ABC, ab = AC, be = AE, the perimeter of △ BCE is 12, BC = 5, find the length of ab
• 13. As shown in the figure, the side length of equilateral △ ABC is 12, ad is the middle line on BC side, M is the moving point on ad, e is a point on AC side, if AE = 4, the minimum value of EM + cm is______ ．
• 14. As shown in the figure: the side length of equilateral △ ABC is 5, ad is the middle line on BC side, M is the moving point on ad, e is a point on AC side. If AE = 2, the minimum value of EM + cm is________ The title says that the length of the side is 5. I can't find it on the Internet. I want the mid-term exam tomorrow
• 15. As shown in the figure, the side length of equilateral △ ABC is 6, ad is the middle line on BC side, M is the moving point on ad, e is a point on AC side. If AE = 2, the minimum value of EM + cm is () A. 27B. 4C. 37D. 1+27
• 16. Let the area of the quadrilateral ABCD be one, divide the edge ad into three equal parts, the dividing point is E.F, let AE = EF = FD, and divide BC into three equal parts, the dividing point is H.G, so that BH = Hg = GC Connecting EF and GH to prove s quadrilateral efgh = 1 / 3
• 17. As shown in the figure, the side length of equilateral triangle ABC is 6, ad is the middle line on the side of BC, M is the moving point on ad, e is the point on AC, if AE = 2, then the minimum value of EM + cm is?
• 18. In triangle ABC, D is the point on AC, passing through point D as de parallel to CB, intersecting point AB at point E, and the area ratio of triangle ade to triangle ace is 1:16
• 19. As shown in the figure, in RT △ ABC, ∠ B = 90 °, ab = 1, BC = 12, take point C as the center, CB as the radius of arc intersection Ca at point D; take point a as the center, ad as the radius of arc intersection AB at point E. (1) find the length of AE; (2) take points a and E as the center, AB length as the radius of arc, two arcs intersect at point F (F and C are on both sides of AB), connect AF and EF, let the circle where EF intersects de at point G, connect AG, try to guess Think about the size of EAG and explain the reason
• 20. In the triangle ABC, CD is high, e is the midpoint of CD, the extension line of AE intersects CB at point F, AE = CE and AF is vertical to CB. If EF = 1, then AE