Joke Collection Website - Mood Talk - As shown in the figure, △ABC is an equilateral triangle, D and F are points on CB and BA respectively, and CD=BF and AD is one side to form an equilateral triangle ADE.
As shown in the figure, △ABC is an equilateral triangle, D and F are points on CB and BA respectively, and CD=BF and AD is one side to form an equilateral triangle ADE.
(2) Quadrilateral CDEF is a parallelogram.
Connect BE, ∵AB=AC, ∠EAD-∠DAB=∠BAC-∠DAB,
∴∠EAB=∠CAD, AE=AD (△ADE is equilateral Triangle),
∴△AEB≌△ADC,
∴∠ABE=∠ACD=60°. CD=EB
∵CD=BF,
∴BE=BF,
∴△BEF is an equilateral triangle.
∴EF=CD.
∵△ADC≌△CBF.
∴AD=CF.
∵AD=DE,
∴CF=DE.
∴ Quadrilateral CDEF is a parallelogram.
- Previous article:What are some good sentences to describe skin care products?
- Next article:Common faults of BYD f3
- Related articles
- Briefly talk about short sentences.
- The signature of 2020 tells yourself not to be cheated by feelings.
- Heart-wandering mother's day
- What problems should we pay attention to when planting eggplant?
- A collection of sentences (40 sentences) that are difficult for contemporary young people to break silver.
- Fatal reaction of drinking enzyme (case)
- Inspirational sentences in entrepreneurship
- There is a "little New Zealand" hidden in the county 45 minutes away from Hangzhou, so go there while there are few people.
- Answers to the examination papers in Chinese in Henan Province in 21
- A beautiful ancient classic saying: I heard that my husband manages the family well, and my daughter will want to hear about his details for the rest of her life.