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

An example of a risk is _____. taxes insurance an employee injury rent
We would expect warmer Northern Atlantic currents to have all BUT ONE of these consequences on Earth. A) higher sea level B) increased ice melt C) decreased p
If your dividend is six and three tenths and your divisor is equal to ten cubed. What is you quotient
There are 14 bees in the hive and 17 in the garden how many bees are there
Coach Henderson went to the grocery store to buy some cola. Cola comes in three different packages: 6-pack, 12-pack, and 24-pack. The costs of each are shown. W
Marnie packed 18 boxes in 3 hours, which was 72% of the total number of boxes she had to pack. How many boxes did Marnie have to pack?
What is the mass of one mole of beryllium if the atomic mass of beryllium is 9.01?
How would u solve this liner system? y = -3x - 1 4x + 3y = 2 What is x and what is y??
How do cells in a meristem differ from cells in other types of plant tissue?
Why did the counterculture fall apart?