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

Facial expressions and gestures are examples of _____________ messages. a. Verbal b. Nonverbal c. Intrapersonal d. Interpersonal Please select the best answ
Elements from which two families would most likely combine with each other to create salts?
A young man wants nothing more than to be elected to the school's student government. However, he is not well known and has few friends. Which type of conflict
The path of the Sun through the constellations of the zodiac is known as the a. zenith. b. ecliptic. c. azimuth. d. equinox.
Describe the fluid theory of intelligence; then explain your views on this theory.
Express your views and ideas what motivates you to develop and be successful human
darwins explanation for evolution was dependent on which specific concept
Shakespeare's greatest plays were performed first in _____. the court courtyards of inns churches the Globe theater
What was the original meaning of the democratic donkey symbol? A.work hard like a mule in a field B.stubborn like a mule C.not as smart as a mule D.policy choic
Another term for basal metabolic rate is ________.