yasee35
yasee35 yasee35
  • 11-08-2020
  • Mathematics
contestada

i will give brainliest and 5 stars if you help ASAP​

i will give brainliest and 5 stars if you help ASAP class=

Respuesta :

ricchad
ricchad ricchad
  • 11-08-2020

Answer:

BC = 13.4

Step-by-step explanation:

its a law of cosines S-A-S

a² = b² + c² - 2bc cosA

a² = 12.6² + 4.6² - ( 2 * 12.6 * 4.6 * cos 90 )

a² = 179.92

a = sqrt (179.92)

a = 13.4

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