nguyenhoangkhaianh11 nguyenhoangkhaianh11
  • 03-08-2021
  • Mathematics
contestada

cho tam giác ABC cân tại A trung tuyến AM.Biết BC=6cm,AM=4cm .Tính độ dài các cạnh AB và AC

Respuesta :

vyvp999
vyvp999 vyvp999
  • 03-08-2021

Vì tam giác ABC cân tại A (gt) mà AM là đg trung tuyến nên AM đồng thời là đg cao của t/giác đó:

AM là trung tuyến của t/giác ABC nên M là trung điểm BC:

=> BM =BC/2 =6:2=3(cm)

Xét tam giác AMB vuông tại M

AB^2 =AM^2+BM^2 ( theo định lý Py-ta -go)

Answer Link

Otras preguntas

Explain one possible path a molecule might take if it began in a small fish and ended up in a blade of grass
The key club made $192 at their candle sale.They sold round candles for $4 and square candles for $6.If they sold twice as many square candles as round ones,how
Which sentence in this excerpt from James Joyce's "Araby" indicates that the bazaar is a place devoted to avarice, or greed? I could not find any sixpenny entra
what was the mood of the united states towards communism in 1964
Joe borrowed $2,000 from the bank at a rate of 7% simple interest per year. how much interest did he pay in 5 years?
a type of expository writing that identifies a challenge and presents one or more answers
3.02 describe the family assignment
which statement BEST describes an individual enzyme? A. it lowers the activation energy of a reaction and affects many different types of reactions. B. it rais
Order 51/62 32/43, and 74/87
I need help with numbers 4&5