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

what rhetorical features in the preamble reveal the purpose of the constitution? what is that purpose?
what is the algebraic expression of the price of s of shoes plus 5% sales tax
What does a nuclear change involve? melting or freezing mixing different compounds together interactions with electrons a change in the structure of the nucleus
9kg for 12$ how many per kg
Who took control of India after the Mogul empire collapsed?
how many members are there in the house of representatives?
What is the relationship between the crust and lithosphere?
divide 33 photos into two groups so that the ratio is 4 to 7
Read the excerpt from The Odyssey. In a smithy one sees a white-hot axehead or an adze plunged and wrung in a cold tub, screeching steam– the way they make
The word heterotroph means “other-feeder” or _____________. a makes its own energy b must rely on other organisms for energy c able to make its own food