As shown in the figure, abad = BCDE = ACAE, verification: △ abd ∽ ace

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• 1. As shown in the figure, abad = BCDE = ACAE, verification: △ abd ∽ ace
• 2. 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
• 3. 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
• 4. 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
• 5. 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
• 6. In △ ABC, high AD and be intersect at h, and BH = AC, then ∠ ABC=______ ．
• 7. When making excel table, how to calculate the difference between two time numbers and what is the formula
• 8. Chickens and rabbits are in the same cage. There are 15 more rabbits than chickens. They have 180 feet in total. How many chickens and rabbits are there
• 9. A desk has three drawers. Each drawer is 50cm in length, 45cm in width and 0.7dm in depth. How many boards should be used to make the desk drawer?
• 10. Wahaha, the price of mineral water is 1.2 yuan per bottle Wahaha, the price of each bottle of mineral water is 1.2 yuan. Line a and line B offer preferential policies. 10% off for all stores in line a and 20% off for more than 20 bottles in line B. If you are a consumer, which store is more suitable? Why?
• 11. As shown in the figure, abad = BCDE = ACAE, verification: △ abd ∽ ace
• 12. As shown in the figure, ab ⊥ AC, ab = AC, ad ⊥ AE, ad = AE
• 13. As shown in the figure, abad = BCDE = ACAE, verification: △ abd ∽ ace
• 14. 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
• 15. 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?
• 16. As shown in the figure, in △ ABC, ab = AC, be = AE, the perimeter of △ BCE is 12, BC = 5, find the length of ab
• 17. 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______ ．
• 18. 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
• 19. 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
• 20. 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