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

During the California Gold Rush of the 1850s, some Americans in the eastern part of the United States reached California by sailing all the way around South Am
what is a large piece of earths crust that stands above the oceans
How to write 65 trillion
what abiotic factors characterize salt marshes?
write in expanded form 0.450
write in expanded form 0.450
Okay i need help with this question.          Sophie is planting a garden. Her garden is divided into equal sections, each measuring 4 meters in length. Which c
Name the subset(s) of real numbers to which each number belongs. Then order the numbers from least to greatest. The square root of 105, -4, 4/3
Name three desirable traits that are being transferred into genetically egineered food crops. How might these traits help to increase world food supplies?
how do you simplified 7a(3b-2c+4)