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

The table bellow shows the average temperatures in degrees of Louisiana and Texas in June and July June July Louisiana 73-91 80-95 Texas 86-93 91-99 Based on th
FOR DRIVERS ED!! Friction is the… A. Amount of air in your tires. B. Energy that helps your car stay in motion. C. Cost of gas prices. D. Resistance of movement
Which one do I put in the red circle ?
Can you solve a simple physics problem
what does IPK stand for​
Pls i have a 62 in math rn
how do you write a conclusion paragraph on "The Writing On The Wall" by Camille Dungy?
Two people talking about their daily routine in french\english (Must have atleast 7-8 dialogues) 100 points and brainliest if i get two answers
"John has 12 cans of dog food. He has two dogs and he gives each dog 2/3 of a can of dog foo each day. Does he have enough dog food to last one week? "​
I need help with Spanish